Thanks for all the suggestions, responses. All very good info. :)
Well, think I've pretty well decided that I'm going to go with an 11 lb. separate gas bottle. It is just small enough so that it will fit down in the large pot we bring also for this, as I mentioned in the previous post.
However, one thing is bugging me, that I'm wondering about: Is it risky, dangerous, for an LP gas bottle to be stored, transported inside a large, metal pot? My concern is that if the tank 'vents' out some gas, the gas will tend to settle at the bottom of the pot. Wondering if the gas bottle shifting around a little in the pot, and it being metal on metal, if it might generate a spark, and.....kaboom.
Or, am I being overly paranoid? Should I maybe make some kind of sleeve, cover for the LP gas bottle that it will fit in to reduce chance of sparks, before putting it in the pot? I know they make covers, containers for gas bottles, but I've not found any that will fit the smaller 11 lb size; they all are made for the more common 20 lb bottles. A 20 lb bottle is too big for what I want to do here.