I think all of your criteria are good ones. For me "ability to walk v. ability to ride" wouldn't take me out of the game for anything. For me, its all about the courses. Walking and caddies, etc. are great if you can have that option. I think all the other criteria are good things to consider, but none are dealbreakers. Most of these options have new courses to play, great design pedigrees, good accommodations, etc.
It's really down to personal preference....the coastal resorts have the views, etc. whereas the Pinehurst/Michigan/Wisconsin trips will be all about the golf with a different aesthetic. A few have more variety than others...Bandon and Pinehurst have more courses on site than the others, but the qualities are different...it all depends on what you want to do trip lengthwise, repeat play-wise, etc.
One thing I will mention is that if you have not played links golf, and all of you are east coast...there are Ireland or Scotland trips that will be of comparable cost to visiting the resorts you've mentioned, as all are pricey. Some mid-range Ireland itineraries plus a flight that is equal to BOS/NYC/IAD to SFO/LAX in length might make Ireland/Scotland equally as attractive!