Most folks who venture into ice use steel hulls.
You seem to have identified some temporary fixes. More permanent ones will be hard to hard in the Arctic.
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)