I tested an "Xport Flatbed" carrier sold by Performance and was really unimpressed with the adapter for a 2" receiver - it made installation and removal a real ordeal. I'm returning it this week because I don't want to leave the carrier permanently mounted and I'm not willing to put up with the hassle of attaching/detaching the carrier on a weekly basis.

I'll have to go down to the local REI (thanks for the 'heads-up' on their ongoing sale) and see what they have to offer, especially the models mentioned above. Hopefully the ones they carry will have a better system for mounting the carrier in the hitch.