I have spent dozens of days backpacking around Mount Rainier.
However, when anyone has asked me join them in a climb up Mount Rainier I have always answered, "No, thanks."
There are some things worth dying for : Defending your family. Defending your country in military service.
Braggin' rights about "I climbed Rainier" has never made at the top of my "worth dying for" list.
http://www.rmiguides.com
They required we arrive a day early and go through a daylong training/qualifying climbing school before attempting the actual 2-day climb. This is a good idea because it weeds out the people who really have no business being there.
Overall, the whole thing was a good experience, but we never made it to the top. The first day of the climb, it was raining cats and dogs - we got about 1/2 way to the shelter where we would spend the night and people started falling down while slogging through the snow. The guide used his professional good judgement and rightly called the climb off and I never got around to trying again.
I was training to climb Mt. Rainier in about 1980....the previous year (I think) a group (about 17) of climbers were lost/killed in a huge avalanche, and one of them was the best friend of a new flame of mine....he convinced me that maybe I should NOT climb it.....haven't really had a desire since.