I'm a travel agent and I'm planning my own wedding......
I dont know why you would want to do this on your own totally. I do this 40 hours a week and there's a lot to it!
I recently went to Cancun and Riviera Maya and did a Destination Wedding Tour. Hotels set up their weddings so we could see what each hotel could offer. There's no way as an individual you would be able to aquire this much information.
So dont knock it until you try it!