Exercise caution when running those small heaters on an extension cord either at home or elsewhere. The Moore Supply Company here in our vil, a state-wide plumbing supply provider, suffered a $2.5 million dollar loss this week when an employee left a space heater running on an el cheapo extension cord. Total loss of their operation. Fire Marshall stated the ext cord was the culprit.
Doubt you'll burn down your tent but I see a lot of these heaters in garages where bike owners are trying to keep warm.