Yes, they both use 1lb propane tanks.
I store the Coleman in the large exterior side compartment. I also keep a few 1lb propane tanks in there.
I store the small BBQ in the rear. The BBQ can get smelly so I put it in a plastic garbage bag and no more BBQ smell in the van.
I have a Quick Connect hose for the built in propane tank and two propane extension hoses that I really should use instead of the 1lb tanks. I bought a splitter so I should be able to run both the Coleman and the BBQ at the same time from the van's propane tank.
I haven't tried it yet.
Here's what the splitter looks like: