ORIGINAL: feederwatcher

Had my first elk hunt this past year and one of our biggest problems was keeping warm. We had two tents, one with propane heater and one with wood stove. The propane heater couldnt get enough air to burn very hot and the wood stove had to be rip snortin hot to draft enough, which made it too hot in that tent. Is there something else that burns better at altitude ? Like maybe coal............

Would welcome advice from some seasoned pros.............