What's everyone using. I like those Coleman Black Cats (catalytic heaters) that run off 17 oz bottles. They put out 3000 BTU. Menards had them on sale for $44.00 2 weeks ago. I refill my little propane bottles off the 20 pound tank with a refill adapter.
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=45989Sportmans guide had some really neat small wood stoves from Norway last winter. They were old and used but oh so neat. They had a fish on the outside door and very heavy duty. Only $100 but alas...I did not get one since neither of my ice house rigged for wood heat.
Any other tricks you use for whatever?? I have a fan jury rigged to blow heat down to the hole to keep it ice free.