When my wife and I were planning our first car-camping trip together (it had been ~12 years since either of us went camping), I borrowed my brother's tent and bought a Walmart-branded air mattress and Coleman manual pump. Our problems were numerous:
1) It was pouring rain and dark when we were trying to set the tent up, which I had done alone previously and I was very bad at communicating with my wife about how it went together (it was way too big/complicated for our needs and not one of the easy clips-on-poles designs), so the entire tent was soaking wet and full of water before we got the rain fly on it. I'd ignored our friends' suggestions to get an Easy-Up, not realizing how useful they were, or how you could put one up and then assemble a tent under it while keeping the tent interior dry.
2) We only had our two bath towels for cleaning up the water in the tent.
3) Our camp site was a crushed stone pad meant for RVs, but it turned out a river to rival the Mississippi runs through that site when it rains, and it ran right into the side of our tent.
4) I hadn't tested the air mattress's inlet valve vs the Coleman pump, figuring they would be a standardized size. The best-fitting pump nozzle was 1/8" in diameter too small to seal against the mattress's valve and we didn't have any way (no duct or electrical tape) to increase the nozzle's diameter, which lead to a half-inflated bed (aka, sleeping on the ground with the mattress forming a wall around us to keep the water out).
5) The road out of the park was flooded 10" deep and one of our group's vehicles was washed off the road, so we were stuck in the campground when we wanted to go to the nearby Walmart to get a carwash sponge, a new mattress or inflator, new towels, Easy-Up, etc.
6) Our friends mainly had tiny campers or teardrops so they didn't have much gear suitable for helping with our problems and couldn't offer a dry place to sleep
7) The dog's crate and our excessive amount of gear took up way too much space in the truck for us to consider sleeping in it.
We stuck around with our friends the next day, but packed up and headed home before dark figuring we'd try again instead of staying another night.
Surprisingly enough, my wife still likes going camping (more to hang out with our friends than being in the wilderness) and we've gone on tent trips since, but we agreed to build a teardrop so we'd be more comfortable.
Disasters are what you make of them, and in every rain storm since that one, we've joked about how it could be worse.