How to store cheesecake for long-term?
Still tasty gives you 2-3 months on cheesecake in the freezer.  It will be safe indefinitely at freezing temp, but the texture will change somewhat.  As @ElendilTheTall says, foil and plastic wrap are your best bets.  Additionally, I might try freezing it for a day to get solid, and then sticking it in a vacuum sealed bag.  If your seals aren't airtight on something else, then cheesecake will pick up any funky odors in your freezers.

Congrats btw, and I'm gonna let you in on a secret about the eating the wedding cake at 1 year - it all tastes worse and some tastes really bad.  Normal or cheesecake or whatever, the cake is pretty much always bad by then, but luckily it's not about the cake taste.  It's about reliving the memories and laughing over bad cake.  So don't worry too much about if the cake is not that tasty then - take a bite,remember the wedding, and have a good chuckle.