should I still stick to the plan for may long weekend camping?

We have booked the pike lake campground 3 weeks ago (It was 22° for Friday, 18° for sunday back then) Now it looks like there is a high chance of snow and rain for all weekend.
What are the suggestions? Should I be just never mind, let's do it, or d you say don't be stupid 😅
I'll probably buy Mr Heater buddy to warm up the tent cause my sleeping bag is not for winter 🙃
Open for all ideas! Thanks