my oppinion.... Saftey...
I know this may sound rough... But be safe...
Forget about it... There isnt any coyote worth risking your life over... Its probabley good and frozen to the ice by now... So a drag line probabley wont work... and just being by the edge of the water is Dangerous enough.. Just remember that the next time you hunt that spot and if they are on the ice let them go... or at least get to the other side...
There are plenty of coyotes out there... Go get the next one...
MIke
safety first....