St.Nick. is the jewel of Glacier park climbing. The problem with that peak, is the approach.Lots of miles, with some awesome bushwacking.I new a couple of people that did it car, to car in less than 24 hours,( super human) they forded the flathead river, (at I forgot what creek,) bushwacking all the way. . If you climb it, you don't need to pull that overhang that every one talks about (first moves). Just start about 100'to 200' left, and that keeps it at about 5.2. for the first pitch. Mt. Wilbur is also. a good climb, with lots of exposure. Can be done in a day. 8 hours or so, I don't remember? There are so many great climbs in the park, I am kinda reminising.
Good luck have fun!