My biggest single ***** with camper trailers, is that when wet (i.e. raining) and you have to pack them up (fold them down) on to your bed, we bought an incontinence sheet to cover the bed and bedding when folding it up wet, it is the single biggest pain in the ****
My daughter and her husband (and 3 kids) just bought a camper trailer, bloody good value, but I reckon it takes longer to set up than a tent, yes it does have built in kitchen and everywhere to put stuff, but watching the poor bugger put it up makes me tired. They had to tow a trailer anyway so they thought the camper trailer was the better option, at least there is a place to keep everything and you are not packing all your stuff on top of everything else like you do in a 6x4 trailer
They bought a Black Series Camper (the Alpha I think), bloody good value, we paid over $7k in 2002 for a 'tent on a trailer', these things offer so much more
http://blackseriescampertrailers.com.au/