Cabelas has there Mr buddy heaters on sale. They have small ones that are reconditioned for what seems to be a good price. Not sure how handy they are to have.
Link:
http://www.cabelas.com/product/mr-h...?destination=/browse.cmd?categoryId=243294480
Link:
http://www.cabelas.com/product/mr-h...?destination=/browse.cmd?categoryId=243294480