Our kids are older now (20 & 18) but of all the holidays we went on, from keeping to a budget to much more expensive, their two favorite holidays were when we hired a camper van. We didn’t get a Cali until they were too old to want to come with us, so hired vans.
First we did Northern France in a big white, then Canada in what we thought would be a beast, but turned out to be quite small by Canadian standards.
Obviously, Canada was not cheap at all (we knew it would be the last holiday we could do like that as the kids got older). The point is that we now regret not buying a Cali sooner, whilst they were younger. They loved the freedom of roaming from place to place, meeting new kids every few days, finding different places to go and explore. They really didn’t care where we were or how much we spent...they loved it for what it was, an adventure.
Over the years, we spent much more on package holidays which are now long forgotten, but the camping ones they loved. Wherever you choose to go, even if it’s 10 miles down the road, I’m sure they will love it and the whole family will have lifelong memories.