Hi Reg
We put the water bowl in the awning, like others have said, if kept in the van, it gets knocked over. Same for food dishes. Mine are fed in the awning too.
I'm a great believer in crates. We have two crates which we take away with us in the van (carry them in the car). Both dogs were introduced to crates when they were youngsters. If you start now, by the time you go away, it'll see the crate as its den. You can buy clip on metal water bowls, quite useful in the summer.
Also, I'm not sure if you've had dogs before but may I suggest you enrol on some dog training classes? They are great for puppy socilisation and a good trainer will always be there to advise and assist with any queries you have on dog behaviour etc. (and of course, your own behaviour).
Just my tip, up to you to consider it. I'm not a fan of staking a dog and leaving it unattended. There is a possibility it could get caught up causing injury and possibly even strangulation.
Make sure your dog is wearing a comfortable collar with a name tag, and put your mobile number on the tag, incase it escapes and someone tries to contact you to.
Depending on the dog, in some circumstances some are escape artists and will find a way to get out, so just watch out for that, particularly around the caravan wheel arch, under the caravan door, that sort of thing.
Lisa