Back when I had the big extended length camper several years ago, which the rear jacks hung low on, I hit a series of large road cones with the right rear jack in a construction zone. It didn't tear the jack off, but it did tear the lower mount out of the plywood and damage it, plus bend the jack a little.
On the same camper, which was missing one of the roof vent covers, I had put a piece of plywood over the vent hole and a large rock on top of the plywood to keep the wind from blowing it off. Well, later on, I forgot about the plywood and the rock and I drove it down the road. When I got to where I was going, I remembered about it. I went on the roof to check it and both the rock and the plywood were gone. Hopefully someone behind me didn't get a large rock on their hood or through their windshield!
Again, on the same camper, I had put a bicycle inside the camper in the main hallway, leaning against the counter. The bicycle moved while I was driving and turned on the gas control for the stove. When I got to where I was going, I opened the camper door and was about knocked out by the gas smell. Fortunately, nothing lit on fire. I learned then to shut off the propane tank while driving.
Also on the same camper, when I was first bringing it home, I didn't have tie downs for it yet. I thought, I'm only going a short distance in town, I'll drive carefully and it will be fine. It was fine for most of the trip, until right before I to my neighborhood. Someone pulled out in front of me and I had to brake hard. The camper slammed forward and bent the front wall of the truck bed and dented the cab. Later on, I ended up having to unbolt the bed, lift it up and pull it back, remove the front bed wall, straighten it and then pound a pipe into the upper lip/channel, which was round and perfectly sized to fit a pipe into, to strengthen it, weld a piece of steel angle along the bottom where the bolts tore out, then put it all back together. I've never hauled a camper without tiedowns since then.
01 International 4800 4x4 CrewCab DT466E Allison MD3060
69Bronco 86Samurai 85ATC250R 89CR500
98Ranger 96Tacoma
20'
BigTex flatbed
8' truck camper, 14' Aristocrat TT
73 Kona 17' ski boat & Mercury 1150TB
92F350 CrewCab 4x4 351/C6 285 BFG AT 4.56 &
LockRite rear