do you have a gate or restraint for dogs in the car I have a caravan

Yes

I bet they might have a fence that you put across the back if you want to keep the dog in the very far part of the van. We use to have one a long time ago when we had a mini van

They have a harness that attaches to a seat belt to buckle in your dog and depending on the size of your dog they also have a basket that attaches to the front seat that you sit small dogs in