We have always taken our bikes in the room. We usually bring an old sheet to put on the floor.

Have had some strange looks in regards to getting the tandem in the lift (this would work for any bike BTW that doesn't fit in a lift). Lift the front of the bike in the air and wheel it in on the back wheel. Usually lifts have enought height. Just hold the bike up so it doesn't touch the nice lift walls and you can get in anywhere.