A too low of a canopy only happened once to us. I believe it was in Ventura, CA. I was watching so I didn't hit it. However the end of the MH and the toad were still out in traffic and of course I couldn't back up into the traffic with the toad on. Had to unhook the toad in traffic and then back out into the traffic.
A motorcycle cop came along, asked what we doing, said "fine" and took off. I thought he would have stuck around for two minutes to hold up traffic while we backed out. Noooooooooo - must have been quitting time.
Bill