In reply to mike123:
Have you towed smaller trailers before?
If not, reversing takes a bit of getting used to, and if you've not practiced before you get stuck in a place you can't drive out of with lots of people watching it could get stressful, so borrowing a trailer and doing a bit of practice in an empty supermarket car park before the trip might be a good idea.
Are you kids old enough to help you unhook the van and manhandle it if maneuvering gets tricky? Don't let your ego get in the way of taking that option (with the help of locals if required).
Otherwise I'd say doable as long as you do your research and take your time.
You need to give things a wider berth to allow for the trailer swinging in, but you'll probably be hyper-vigilant about that on your first trip, it becomes more dangerous when you start to give more back over to autopilot.
Main rule is to do everything more slowly and deliberately than you might do when driving the car only. For example, never take a last minute decision to leave at a junction - you could correct too quickly and flip the van.
Be careful going downhill - that can make the van unstable so take it extra slow.
If the van starts oscillating, you need to change the speed. It's slightly counterintuitive but mostly better to pull the van out by accelerating rather than braking (unless there's a change of road conditions ahead that mean you're going to have to brake again immediately).
IT will be tiring as you'll have to concentrate much more than usual, so give yourself lots of time to take breaks along the way. The good thing is, you've got a caravan; if you're tired, stop and change plans, don't try to soldier on.