You can certainly call your celebration whatever you want, but Disney does make one distinction between weddings and vow renewals, and that is how they handle the license. Just make sure your planner knows you're already married so he or she isn't wondering where your license to marry is on the big day.
I've read your wedding TR and it looked like it was so much fun, all of the pictures look so beautiful Congratulations and welcome to the boards!
Our Disney Wedding was technicaly a vow renewal as we were married ealier at city hall in NYC. I like to liken it that experience to getting your drivers license!
I refer to the city hall thing as when we got married, but Disney was our wedding!
Our planner Tanis and Rosie who does the floral, entertainment and photo coordination for Escape brides knew (and of course so did Rev. Miller) but never once did they refer to it as a vow renewal. They all knew this was our wedding, not a renewal of vows that we said in about 30 seconds without DH's family even there!
In fact, we are planning on doing a vow renewal, maybe even 2! One at 5 years and one at 10! simply because our Disney wedding was the most amazing experience ever.
Good luck to you! If you read through a bit of my PJ/TR, you can see our civil ceremony at city hall and I'm just about to get to our Diisney wedding experience...
HTH!
I'm starting to get a better understanding of how to plan a wedding now. I'm enjoying reading your PJ/TR, I love the idea of going to World of Disney on that day. 
I just have to find a way to convince DF to get on the train semi dressed up into the city.
Just wanted to say welcome and looking forward to hearing your plans! have fun!There are alot of great ideas here and helpful dis brides!
I'm feeling a bit more calm about planning a wedding now since I have officially joined. 
