We have had caravans too number, there are pluses and minuses to both I think. A caravan is better in that you can get away from the driving cab part and it feels more "homely", a motorhome is quick to set up when you get somewhere, we have been parked, sorted and sitting with cup of tea whilst caravaners are still getting themselves sorted out. We only need to disconnect the electric supply - the water and waste is in a tank under the van and filled and emptied when necessary on site therefore no fetching and carrying of fresh or waste water which you get with a caravan. A caravan generally is more spacious and much better if you want an awning.
As far a transport goes, we now have a small tow car which we take with us so we are independent on site. But prior to this we have managed with bikes, buses with our bus passes, walking or hiring a car from Enterprise who will pick you up from site to arrange car hire.
Swings and roundabout really - and although we have a motorhome at the moment, I sometimes think that I prefer caravans but my OH was getting fed up with towing and we needed a new tow car which was another expense. I admit that I am happier driving the motorhome than towing a caravan now although I guess that's an "age thing" 