I'm considering bringing the coleman out next week because of the burn ban. I have been using the Jetboil along with the fire for cooking.
How long will the coleman run off a 1 pounder?

About 1 1/2 to 2 hours on high. Obviously longer if you keep it turned down on low/ simmer

I always take one more bottle more than I think I need. I just look at the fuel bottle and when it starts getting frosty it’s about empty.