It depends on whether you want a high pressure (before the regulator) or a low pressure (after the regulator) line. Most LPG camp stoves and BBQs have their own, built-in regulator so, most likely, you'll want a high pressure connection. The quick connect LPG fitting installed on most RVs are low pressure so there are numerous posts on the RV forums that are frustrated that they can't use their camp stove or BBQ. Therefore my info relates to a high pressure connection.
If you have the room, there's relatively easy to install DIY solution called and Extend-a-Stay. In addition go being able to connect an external appliance, you can hook up an external tank for for LPG if necessary. Here's a video:
Extend-a-Stay is a brand name but similar units are available from other manufacturers, often in a kit with hoses: