I don't see a downside to waxing and prepping 'early'. I do see plenty of positives:
1) Keeping your toys in good shape ready to go reduces added 'stresses' when it gets down to the wire when the snow flies again.
2) Wax is cheap. And if you consider repetitive waxings somewhat like season ing a cooking pan, more is better & having the luxury of time between waxings and scrapings, allows for more 'curing 'time.
3) It's good therapy while it helps to maintain and improve your skills, which could save bits of time later.
4) Allows you time to determine and research which additional/upgrades tools and supplies you might need and watch for deals.
(This reminds me to add a cycle or two to my newest boards, purchased late season.)
Keep your toys in great shape and close at hand....you may never know when you need them at a moments notice.