Bump ^
I did some more searching online, and I can't find a case where something went wrong with a propane heater as long as these two conditions were met:
1) The space where the heater is used is properly vented (technically not a requirement for propane heaters, but it helps manage the condensation build up)
2) The propane tank is kept outside the space being heated
Looks like I'm leaning toward the small Mr. Heater (MH9BX). Seems like the best compromise on size/weight and heat output.