After hearing all the horror stories, especially yours, we have done two pre-emptive strikes with the DMV(we don't even own the SMB yet). We have a very small DMV office in Fruita and it's a very friendly atmosphere. We decided to go the safe route and register it as an RV but the process has not been easy. It boils down to a certified weight slip and a VIN inspection and in the end $5,150 in taxes, registration etc. ughh! The tax rate of course is based off of the original MSRP.
So we pick it upthe SMB on Thursday and then hopefully head to the DMV to do a smooth but painful ($$$) registration.