Well we got back home yesterday and had a successful trip. The park worked out really well for us. The shuttle was pretty convenient and we drove one of the days and that worked out well also for about the same price as bus passes. All in all we've decided that we'll do it again next time as it really saves a lot of money on food and lodging over the course of an 8 day trip.
The only negative was quite a few little black ants that worked their way into the trailer by the last day or two. I doubt they'll like Idaho winters if they make it that long... :B
Definitely outside my comfort zone from a density standpoint but once you accept that it's basically like being in a hotel while traveling versus camping it's fine.