We have a folding camper and absolutely love it.
We had a trailer tent before and that was an endless faff to put up, it took about 3 hourse and caused many arguments
It was great in terms of space, and having beds off the ground, but really wasn't worth the time.
Our FC takes literally 10 minutes to put the main part up - it's just unfold the beds, extend some poles, sort the cupboards and it's done - then the awning takes 30mins-1hr ish, but don't need the awning if it's only for a weekend or so. The awning gives loads more space though, and we use an annexe for a 3rd bedroom for dd - so ds in one pod, me and dh in another and dd in the awning, works well.
We don't get chilled/damp, we have EHU and use a fan heater at night which warms it up quickly. The beds are comfy and using duvets/blankets makes it homely and warm. It's great having a proper hob and sink unit, and I love having the seating area, so much nicer than sitting round a chilly tent on deckchairs at night.
I love that the beds stay made up and there is always a little 'room' to retreat to and have a rest in the day.
For me it's the best of both worlds - the feel of camping with the luxury of caravanning. Storage is fine if you have a garage or even just a driveway, you can get all weather covers. Easier to pull than a caravan.
I luffs my FC and one day would love to upgrade to one of those new models with pvc material, integral heaters, ovens and the works. Ours does have a little toilet cubicle which is a wonderful thing :)
Good luck - let us know what you decide to do and give us some links to ogle over help you decide!