I think the OP was looking for things to do considering that he CANNOT go south for the winter. Contrary to what 90% of the people on here think, not everyone can go south for the winter. Some of us have obligations/jobs that would frown upon it.
During the winter storage months my wife and I go to every camper show we can find. Its fun to look for new campgrounds and new "ideas" for our MH. I also take in a few motorcycle shows over the winter.
Also it is helpful to have a list of things that your MH needs and start acquiring them before spring time. Are there any upgrades you want to do? If so now is the time to buy the materials for the upgrades. We also start planning our next trips. I build a spreadsheet with links to campgrounds, stuff to see and so on. I fill in prices and ratings and then plug in links to video. This takes a lot of time but I have 6 months of winter here so time is on my side. I will be going to Sturgis in 2017 and started my spreadsheet of "info" a few months ago. This weekend we will meet up with another couple that will be going with us and we will start the review. Yes I know its super nerdy but you have to do something during the long winter months.
So that and building motorcycles is how i will spend my winter. Oh yeah and a strip to Vegas.