Why is this thread in JS? It should be in GD or OtR.
I have a portable gas grill. Usually when I take it on a trip it's kept in my roof-top carrier so smell isn't an issue. I did have it inside my car a few times, I don't remember smell being an issue then...
The problem with any of these for continuing travel is it needs time to cool off you can use any of the above if you can hose it down after use and buy heavy duty garbage bags to put it in cause it will mess up ur car otherwise
I usually keep mine in a garbage bag. I've found it only needs a few minutes to cool off after use, I've never needed to use water to cool it off. I usually use regular (not heavy duty) garbage bags and it hasn't been a problem.