Welcome aboard BL !
Incidental catches.. cutting the line and leaving a hook in their yap isn't the way to go.. Land it.. unhook it and return it... no different than we do with most fish we catch during the winter. Especially considering you say you are going to fish in a hut, there should be no issues of eye's freezing over etc. The lads and I have pulled many a Laker/whitefish up from 70 feet... taken pictures and release no worse for wear in -32C weather. Since you're fishing 11 to 14' of water there isn't any chance of Pickeral with their bladder out their yap.