Jackson & Targhee are overran with gapers and posers. If you're going to drive 400 miles you'd be better off flying into Spokane then hitting Silver Mountain, Lookout Pass, Montana Snowbowl & Discovery. All 4 have good snow and great terrain plus a local vibe you won't find at most ski areas anymore.
I've always gotten a great vibe at Targhee. Only been there middle of the week, with no crowd, which always helps.
Will keep in mind your recommendations as I start planning a month long ski gypsy trip next season.