Thanks for the replies and welcome! Sounds like a phone call to Sportsmobile may be in order before the next winter
Regarding garaging my SMB, unfortunately the clearance isn't due to the height of the door, but A) the height of the door header and B) the MASSIVE support beam that runs laterally across the garage half-way in and holds up a second-story bedroom. Don't think I want to be messin' with that
See what I can do about getting some pictures posted...