We took a 7 week trip (with a teenager and a pre-teen) across the country last summer in our 40ft MH (that we had only previously used that spring break at FW), so the mishaps were numerous.
Let's see...
1) The battery disconnect switch (turns off everything) is low and next to the door so you can reach in and turn it off when in storage. Passenger seat also happens to be there. The cupholder in the middle is not easy to reach, so I set my water bottle on the floor next to my seat. The water bottle flipped that switch and everything stopped working but the engine. I spent like 30 minutes reading the inverter manual and troubleshooting and then somehow figured out the disconnect was flipped.
2) Same day/drive - my husband had turned on the headlights and when we stopped to check in, there was a beep that wouldn't stop. Finally figured out it was a warning the headlights were on.
3) Also same day, the campground was super windy (outside Great Sand Dunes NP). Our big slide seemed to get stuck when we were putting it out. Went to look and the slide topper had buckled. The wind was flapping it like crazy. Tried putting rocks on it to hold it down. Ended up having to remove the whole thing.
4) Our RV specific GPS sent us on the Burr Trail, which is like a Jeep road in
UT. We got to a point where we couldn't turn around and had to keep going, eventually on the back country road into Capitol Reef NP. The road was so washboarded we had to drive really slow so as not to mess up the suspension. I think it was 25 ish miles that took 8+ hours.
I know there were more from that trip, but I must have blocked them out.
One other that comes to mind was back when the boys were cub scouts and we were tent camping. We had 2 cots, my husband was in one and the boys in the other. I can sleep on anything, so I volunteered for the ground. There was a huge thunderstorm in the middle of the night. I woke up in like 3" of water with incredibly loud thunder claps. Luckily nothing near us got struck by lightning. Turns out your tarp needs to be the same size as your tent and no larger.