You don't need to limit your purchase to a low pressure grill, if you purchase a grill where you can remove the regulator. I found the Weber portable series pretty highly rated and the regulator comes off pretty easy.
Then it's just building your own Quick Disconnect hose, which admittedly took me a bit to figure out. There is a company that makes a "kit" for that, but I didn't like the fact that i now had a 12' hose permanently connected to a tiny aluminum gas stub.
For The Weber's at least, I found that the key was to stick to Amazon and stay with the NPT type connectors and for the QD, make sure you get one for LP gas. Then, all I needed was a 1/8" NPT female to 1/4" NPT Female reducer + a 1/4" NPT male to QD Male for LP gas. Then you can find standard QD hoses of whatever length you want that has a QD male on one side (sticks into your RV) and the other is QD female (clicks onto your grill).
Piece of cake, right?
(not really, I've got about 10 misc. pieces also that don't fit one way or the other due to mismatching each variable of NPT/FIP/straight, male/female, 1/4" / 1/8", 3/8"...)
Hope that helps.
Cheers,
Curtis
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