Is you base dirty? If you rode through a lot of shit liek dirt and rocks from spring riding then probably want to clean it so your not just waxing over that crap. Hows your base looking? This wouldn't be a bad time for a base grind if its pretty beat up, then your good for next season you don't have to clean it and you can just wax it up now and scrape it in the fall. Thats my plan because my base is really chewed up right now thanks to park riding and a lovely rock crusted hill called lake Louise.
If your base looks clean and its in good shape just wax it.