score:3
According to the book Bandido: The Life and Times of Tiburcio Vasquez By John Boessenecker (2012, p. 4), Anza started recruiting in Culiacán on March 28, 1775.
I have the impression that he was only there for a few days at most. This page from the US National Park Service also mentions that Anza was at Culiacán in March, but then says:
He continued recruiting in the villages of Sinaloa and El Fuerte in the Province of Sinaloa, and Álamos, in Sonora in March, April, and May. The expedition spent the summer in Horcasitas, the capital of Sonora at that time, so Anza could train his new recruits for the difficult crossing of the Apache country that lay ahead of them.
Looking in to this some more, I've found some contradictory information. Unfortunately this too is unsourced, but it comes from Portraits of Basques in the New World edited by Richard W. Etulain and Jeronima Echeverria (p.52).
Lieutenant Colonel Anza arrived in Culiacan, Sinaloa, from Mexico City with a large mule train laden with supplies and began recruiting families on March 25, 1775.
If you want to try and sort out the real story, here is a bibliography all about Anza which should be helpful.