I realize I am late to the party here, but wanted to add my solution for the Coleman Roadtrip Grill:
Originally Posted by Knauby
Not completely familiar with your Jayco model but most RV's regulate pressure at bottles to low pressure. If the Coleman stove has a regulator on it you would need to convert into a low pressure system like your camper uses, not high pressure off a single bottle or throw away bottle. I think it is as simple as unscrewing the regulator and using some fittings to convert it to low pressure use
This is correct. You will need to remove the Coleman proprietary connector that screws into the grill and use connectors to fit it to a quick connect coupling.
I wound up finding the connectors at Ace Hardware, and the quick connectors and extension cable at Camping World - and it works like a champ! I used yellow gas tape on the threads and silicone sealing tape just to ensure no leaks out of an abundance of caution.
Here's the result:
I also made a complimentary connector to allow me to use bottles or the high pressure tee on the house bottles: