Heater question for those that fish in a tent

[Majja]

So as part of getting the wife and kids on the ice an having a good time I think I may need to add a heater. I have the Clam big foot witch is 7.5' x 7.5' not huge but not exactly small either but with 4 it can get kind of cramped. So I was wondering what heater to look at. The smaller sunflower 1lb tank top heater or the next step up buddy heater.

So please let me learn form your experiences and mistakes.

Thank You
Majja
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