ive had every format going over the years, hammock n tarp, small tent, big tent, small campervan, motorhome, static....and just about everything in between.
the way you describe your family at the moment i'd say caravan would suit you best.
maximum living space, all the comforts, when your pitched you still have the motor for days out, no extra tax/MOT/insurance for a vehicle you dont use every day (motorhome). park up, drop the legs, fill your water, plug in, job done.
i personally love this country, there are some beautifull parts, the weather can sometimes prove a challenge, with a toure