Reasonable price to travel round trip to disney world? Park tips please?

You really will want the water parks...after doing the big parks for 2 days in a row everyone will want a break, the water parks are perfect....very fun with only a little walking compared to the big parks, plus the water feels great in the summer heat and you get a killer tan...as for saving money, take sandwiches/fruit in with you when you go to the parks, that'll save quite a bit...and my best tip when doing disney world is --- during the summer the parks are packed, so be standing at the gate (not at ticketing, at the entrance gates) when they open...that'll give you a good couple hours before the place is mobbed...have fun...oh and the same goes for when it's time to close, the last hour the parks get much less crowded...for instance right before they shutdown you may be able to just walk on space mountain with only a 5 minute wait...so plan to stay to the end...if necessary take a few hour break in the middle of the day...have fun.