Well, good news... so far. Got the call from the RV center this morning and, evidently, just a good cleaning was all that was needed. I'll go pick up the Roo in the next couple of days and then bring it back to the house and set up in the driveway over the weekend. Temps aren't supposed to be too bad - low 80's. Would sure like to see higher temps to give the a/c a thorough work out, but I'll see how cold I can get it inside.
Thanks to everyone for your suggestions and input. Especially about recharging the a/c - this stuff is priceless. Again, thank you!