Took family camping and did some water water rafting. Wife came along but she decided to bring her newly purchased kitchen because she does not like the way I mix dirty dishes and reuse pots and pans without thoroughly cleaning them. Dangit, its camping, what the dig deal?

I find a few rocks, make sure the pot doesn't fall over and some twigs and a bit of fire. We will have some of the best chili and rice after a long day in the river. But...
She bought a Colman high altitude camp stove that runs off 1 lb propane tanks. Damn, this thing rocks and boils water so much faster then my home stove. I discovered the new grill will not accept the hose from the 20 lbs propane tank? After much cussing (her at me, of course) we inserted the 1 lb tank and it grilled the steaks just fine. It just burned the propane off fast. I realized that pin isn't long enough. I tried searching but have no idea what those parts are called or how this pin is measured? Tips? Is there a regulator right before the line enters the grill? Will the big regulator right off the tank do the trick?