I don’t have a caravan although I’d quite like the idea. I never get very bothered by caravans on the road. As long as they’re towed by something substantial that’s up to the job in terms of power and weight they generally keep up a reasonable pace. Remember they are limited to 60mph on motorways and 50mph on single carriageways.
I’m always more annoyed by impatient drivers behind me than slow ones in front – and I’m not a slow driver, I just generally obey the speed limits. When I was a heavy goods driver, years ago, I was never bothered by caravans. What does bother me a bit is farmers using tractors and trailers to move goods over medium distances just to save on hiring a lorry.
I like the idea of a trailer tent. There you get a bed area with a proper floor and a tent upper section, plus a big tent extension that you can add if you’re doing more than an overnight stop.