You can be warm at the fire in the fall - get this

Just get you a Mr Heater Portable Buddy heater. Easier and don't have to worry with a hot can, hot coals, and having to refill with coals periodically. Set it between two chairs, wrap a blanket around the back of both chairs, and another blanket across yours and your seatmates laps, and the heat will not only warm your back side, but also keep the rest of you warm also. Sort of like sitting in a warm tent.

Grandson's baseball that starts in March and sometimes goes into November has taught us that one.