I did a loop hike in this park and stayed at several of the backcountry sites with friends a few years ago. There are so many amazing peaks an the views are incredible it is well worth the challenge of the hike. The important thing is to make sure to plan in advance since the terrain is challenging and some of the trails can be confusing. It is worth your time to purchase a good map and plan out water fill ups as well as campsites long in advance. Also check out if you need permits and such since that is important. This area can get very cold in the winter, when we did it, so be prepared for surprise snow if you do in certain times of year.