Were there hippies in the USA in 1930?

No, and the answer is that the 1930s and the "1960s" (actually from about 1965-1975) were diametrically opposite types of time periods in American history. This came about because they followed periods of (different types of) excess in the 1920s and 1950s.

The 1920s were a period of "overfarming" in American history. This was literally true in the creation of the 1930s "Dust Bowl" by new farming methods e.g. tractors) introduced in the 1930s, and also the "figurative" overfarming in industry technology, and finance that led to an industrial and stock market crashes of the 1930s. The resulting (and historically bad) "hard times" forced people to worry about survival. "Worldview/philosophy...drugs or literature" were the last things of people's minds in the 1930s, although some "sad" types of music, such as "blues" and "jazz" were popular.

The 1950s created a different kind of excess; of prosperity and abundance; an economic and demographic "baby" boom, following the victory in World War II. this was also the era of conformity, spurred by "McCarthyism. Things were "too" quasi-military and orderly (by historical standards). Young people sought solace in a "rejection of conventional values and the taking of hallucinogenic drugs." Boys, especially, wore long hair to distinguish themselves from their fathers, the clean-cut short haired veterans or World War II.

The 1930s* was not an ideal decade to become a "hippie," i.e., to pursue a bohemian lifestyle.

A high tide of leisure, power, and affluence - think late 1950s-60s, mid-80s - is more conducive to forming and sustaining "hippie" subcultures. It takes all three to support a full lifestyle of exploring alternate sexual options, religious byways, etc., and courting a permanent FBI file for subversive political activity. A person needs "me time" to really embark on hippiedom, and the 30s had a shortage of that.

However, the folks who rode the 30s rails might have something in your line:

• Minehan, Boy and Girl Tramps of America
• this detailed blurb for a book on Teenagers During the Great Depression.

(Both are cited in the Wikipedia entry on "Hoboes.") With that many teens on the rails, there were bound to be some hippieish shenanigans.

While hippies as we traditionally see them didn't exist in the same manner back in the 1930s, the precursors to the hippie movement were around back then. The Lebensreform movement which started in the early 19th century and gained traction in the early 20th century was around and acted as a reform movement that adopted organic farming, a vegetarian diet, and naturopathy. One of the prophets of the movement was Karl Wilhelm Diefenbach - a social reformer and anarchist. During the 1930s, many German migrants part of this movement moved to the United States which helped to influence the hippies.

Hip/Hipster

According to Britannica, The etymological roots of the word Hippy derives from the root word "Hip", and the closest thing we have to Hippies in the 1930's would be African Americans that were into the Jive culture, and were known as "Hip".

Britannica encyclopedia

As might be guessed, the word hippie is derived from the word hip, which conveys being up-to-date and fashionable. This meaning of hip is thought to have originated with African Americans during the Jive Era of the 1930s and '40s.

Speakeasies

The Hipster culture largely grew out of illegal speakeasies during the prohibition period of the 1920's that offered illicit nightclub culture and illegal alcohol, and paved the way for some of the greatest known Jazz musicians of our time.

Prohibition

While jazz music predated Prohibition, the new federal law restricting liquor advanced the future of jazz by creating a nationwide underground nightclub culture in the 1920s. This competitive club culture had mobsters such as Al and Ralph Capone of Chicago and Owney Madden of New York vying for the best performers for their drink-swilling customers. That culture advanced the careers of major jazz performers such as Louis Armstrong, King Oliver, Duke Ellington, Fats Waller, Paul Whiteman, Bix Beiderbecke and jazz itself as an art form. It also would lead to millions in profits for organized crime bosses.

Prohibition forced tens of thousands of saloons throughout the country to shut down, but the demand for drink remained, and thousands of illegal bars, or speakeasies, soon opened. Gangsters, who manufactured or transported liquor in violation of the federal Volstead Act, supplied the liquor, owned the speakeasies, or both. At first some speakeasy owners offered live music by bands linked to vaudeville stage acts. But jazz was a better fit for the era’s party mood. Bar owners soon were hiring small jazz bands with local players to furnish background or dance music.

Were there hippies in the USA in 1930?

Not quite, but there was an illicit Jazz culture during prohibition that would later become the sub-culture of the 1930's Hipster that would later morph into the Hippie culture of the 1960's.