There are three guide companies available for climbing Rainier:
Alpine Ascents International (206)378-1927
International Mountain Guides LLC (360)569-2609
Rainier Mountaineering, Inc. (360)569-2227
They are all probably pretty good. I’ve heard good things about RMI. I don’t know about prices.
It’s possible to do without a guide company, if you learn and practice the basics of glacier travel and crevasse rescue, especially self-arrest. However, it is a bad idea to go it alone with limited experience. Some parts are a little scary. In fact, the park service will likely refuse a solo climbing permit if you can’t show proper experience. But if you can find someone to go with who’s experienced and who you can trust, you can avoid the guide service.
I’d highly recommend the climb if you get the chance — it’s worth it. Incidentally, the public shelter at Muir Camp is not so comfortable to sleep in. If you don’t use a guide service shelter, you might prefer your own tent.
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