I think you may have moved by now, but I checked this option several years ago for our two kitties and we went with the plane trip. It looks AMAZING for the pets, but probably more so for dogs. Look up a few blog postings, I can't remember this one lady who had done it twice with her dog and had it all documented.
At the time I think it was running about $500 each or so,but they have to stay in the kennel area (you can visit). Also, it books up FAST so you need to book almost a year in advance supposedly. Maybe less for kitties.