Here is picture of my stove - most river outfitters in Idaho on the MF, Main Salmon & Selway use these stoves. The hoses have "pin" type valves in them, so no gas escapes when disconnecting them.
Probably not the safest, but it is secure. My buddy has an Alaskan and he is still trying to run down the source of his propane leak on his built in stove - at least I won't ever have that problem. Seems like if I get in a bad wreck I'm probably more vulnerable that the built in propane tanks, but who knows?