I love camping. We've built up a stock of kit over many years from 2 man backpacking tents to the 5 man for a comfortable family weekend to the 8 man for a week+. In the last couple of years, our backs have asked for camp beds, finished off by a particularly lumpy farm in Ireland, but our camp beds and inflatable matresses are more comfortable than the majority of hotel beds (I hate a soft bed!). The fold-up sofa is much better than the ergonomic hell that is 97% of sofas.
It is the slower pace of life and back to basics I enjoy. The DCs aren't distracted by tech and get into colouring, books and games far more readily than they do at home. It's refreshing doing something different rather than being in a mock version of home.
I really miss wild camping and look forwards to the DCs doing it at Scouts so we can all head off on a family misadventure 
I did static caravans a couple of times when the DCs were very little. That kind of turns into the drawbacks of camping without the benefits. Same shit as home, blunter knives and undersized kitchenware.
At least with camping, we know we have out own posessions and what works for us.
We've done a couple of AIs. OK for the daytime, but evenings are boring as we get stuck in the bedroom from 9:30pm. We're not big drinkers anyway, so it's far nicer sitting out by a fire than watching crap TV or hanging around bars.
I've done cottages with friends. The price tag to do it as a family makes me baulk, and I don't want to spend my holiday cleaning up a different house. Camping, you have to keep organised and there's little spare stuff to get in the way.
For the kids, the freedom and chance to team up with other children comes very naturally. Without other distractions, they get more involved in things like cooking and washing up.