True, and that's what I use.If one does not want to go the low pressure connect route, why not just use a tee right off the trailers propane bottle. The hose is much easier to stow, and can be used for the stove or other things too.
On the other hand, Larry asked specifically about using the quick-connect in the first post, and mentioned that he was considering a connection at the tanks in post #7... that option is already in the discussion.
Example: Brass Tee w/3 Ports and 12' Hose