if money is an issue that suxs because for a lot of anime conventions one of the best parts is the dealers room where you can get a lot of stuff discounted
i have only been to two different ones AnimeUSA in Virginia and Otakon in Mryland
i have been to otakon 7 times and Anime USA once (otakon is almost as big as the expo and USA is really small)
they were great and the others are right you will definitly want a camera
also try to make sure you plan the events you want to go to as far in advance
as possible (even if its day before). when i dont plan i end up walking around
not doing much lol so if you plan you'll know where you want to be and when which
helps when asking for directions because you can ask in advance
so for using so much space but sionce i have been so many times i thought givin sum of my advice would help lol have fun