My partner uses, (what he calls), "those orange U.F.O tip-ups" In 20 below weather, we didn't see much of a diff. between regular tip-ups and the UFO's?? Still a good 1/2" of ice cacked around the bottom during our hourly checks. Not to say they don't work! Just not in 20 below weather. They are pretty easy to stack, and have a long extending flag arm on em' making them unique.
Coldhandfluke, Great idea with the frisbees!