Im happy that you are more comfortable with knowing that yes you can have your wedding at Disney with 15,000. I know that your wedding will be the most Magical Day in your life as it was mine. It will be a day you will never ever forget, Trust me! Outside vendors are always welcome. The only outside vendors that are not are food vendors. All food must be done by disney.
I must say that the balloon vendor as well as the video vendor I chose were top notch. I did so much research on them and they came out with flying colors and once I seen my reception hall how beautifully decorated it was with balloon and then met my video guy and wife Stan and Bonnie and seen the video. I was totally in awe. I actually already hired the STVS for my vow renewal in Disney for May 3rd 2005. Thats how good he is.
Here are a couple of site that I went to for favors and such I hope they come in use for you.
http://www.wrapwithus.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=wwu&Product_Code=X#3834
These are guest place cards that were set up outside the hall for all guest to know where they were seated.
http://www.wrapwithus.com/Merchant2...ode=wwu&Product_Code=H#4400&Category_Code=Clk
These were favors for the females.
http://www.wrapwithus.com/Merchant2...ode=wwu&Product_Code=M#4601&Category_Code=Msc
These were favors for the men along with
http://www.wrapwithus.com/Merchant2..._Code=wwu&Product_Code=Y#1200&Category_Code=Y
For the children I gave them goody bags with bubbles coloring books and for the girls cinderella precious moments doll and the boys a lanyard with some pins to start them off with the pin collecting.
These are the table cards I used for each table so guest can find there table.
http://www.fairytalebridalshop.com/tbc.html
These are the wire carriages I bought and spray painted them white and had a family member add flowers and made a pillow with a glass slipper on it inside.
http://www.aandsnovelty.com/macmain.htm
I also had them scatter silver jordon almonds on the tables to give sparkle with the votives that I had scatter around which i only paid 59 cents for 4 at a party store. The siver almonds are cheapest at this site
http://alwayscherished.safeshopper.com/11/1161.htm?837.
Also if you go onto ebay and enter in cinderella wedding you can find alot of things really cheap. I also had champange bottle bubbles at the ceremony and beanie babies for the children to keep them occupied and the pew bows were made for me by a family member she added cinderella slipper to them just like the ones that you can find on ebay.
Well I hope I didnt overwhelm you with all this I just had so much fun planning my wedding and want to share my research if it will help at all.
If you need any other info as I stated before dont hesitate to ask.