worrying unfortunately doesn't help! The temp is supposed to drop back down to 0 or minus slightly by later today (i'm in oakville) and continue dropping down to rest at -6ish by the end of the week, thats daytimes and the nights are obviously colder, i don't think theres any nasty wind forecast to confuse things. I would say you are prob gonna be on for the weekend, i'm not familier with quinte but from what i can gather i would guess some spots in quinte will be sketchy, but not all. You might not have the freedom to rip all over on machines but i'm sure there will be 'safe' spots to fish. If your guide is confident then so am i. Rest easy (work) and continue to look foreward to your weekend, i'll bet you'll be on for the fishing!