Right now is the best time to start advertising your RV in Ontario. Get it out there before all the rest come out of storage in spring, and attract those potential buyers that have been dreaming all winter about an RV. Its important to detail it as best you can, but just price it right and get it on the market before anyone else. You have an advantage; its all ready to go right now, doesn't need to be de-winterized before anyone can see it.
Wait until later in the spring, and you're stuck with it.
Good Luck!