Our first trailer was a Nash 22H, one bedroom trailer. When it was just my bride and I it was wonderful. The camper was small though... my wife had to climb over me to go to the bathroom in the middle of the night, we couldn't walk past each other in the kitchen because it was too tight.
We had child #1 and it made it even smaller. We put our pack and play on the dinette table and were able to continue camping. If it rained... we were out of luck because there wasn't room for my daughter to play around inside the small camper.
Child #2 came along and we knew that our Nash wouldn't be big enough for two little toddlers to play and sleep. We sold our Nash and bought a 29' Jayco with a big slide out.
While I like the Jayco and find it to be much more comfortable and enjoy the interior living space, I do miss the simplicity and ease of the smaller trailer. We could go to literally any campground and get a spot with our 22' trailer, it always fit. Now with our new Jayco (35; overall length) we have to be much more diligent when making reservations. We no longer fit in the easiest to get sites at our favorite Florida campground. They have smaller sites that are mainly used as weekly rentals, whereas the larger sites are mostly used by seasonal renters.
We are still small enough for state campgrounds, thankfully. There are benefits and drawbacks to every type of trailer. If it was just the two of us, we would likely have a much smaller trailer.