I had a hard time finding the 'flare' fitting for a quick-connect adapter on the Blackstone side.. it's fairly unique, and permanently attached. I found it at Home Depot, and bought a LP gas extension hose at a Fleet-Farm, but they are available everywhere. The fittings needed to be adapted male to female, and it's a lot of brass, but works.
If you are connecting to your RV, then you already have a regulator, you only need the hose, and eliminate the Blackstone regulator.
Doug and Patience and Shelby the mutt
2015 Crossroads Sunset Trail Reserve ST26RB
2013 Ford F-150 3.5 EcoBoost XLT Supercab 4x4