I also have an older model fish trap. I got a sport cat for Christmas this year, and you're right. Enough heat to warm up your hands, but that's about it. Alot of guys here love the buddy heater, and their advice has been spot on so far for me, so listen to them. I don't have one myself. I was going to buy one, but according to the site I looked at the shipping weight is 7 pounds. Most of the time I'm the only horsepower towing all the gear, so I watch weight pretty close. I use a sunflower style heater made by Paulin. It doesn't have push-button ignition or auto-shut off like the buddy (great features), but it was cheap ($15 I think) and it's very light. Maybe 2# with the tank. It will last me 4-5 trips on the ice, and it keeps the trap warm enough that I can fish with bare hands and the hole never freezes in the worst weather.
kero