Park City
I've only flown into that area once, probably in 2020 or 2021. We landed at Skypark (KBTF), just north of KSLC. We were only there for a long day, not overnight, so I don't know about O/N fees, but the FBO was very friendly, had a courtesy car available, etc...
We flew in from the south. No issues with SLC airspace, except that we needed to cancel IFR a few miles out to avoid being vectored all over the place. Don't know about arrivals from the west, but it looks like there is are VFR transition routes that should work well. There were specific departure procedures to stay clear of SLC traffic on the way out. Don't recall specifics, but they weren't challenging. As of yesterday, self-serve 100LL was $5.94/gal.