"I usually park at the Contemporary and take the monorail to the parks, or to the TTC. Another way to save the parking money is to park at Downtown Disney and take a bus to the place you want to go."
I'm surprised no one jumped on this, but this is a point of much debate on the boards from what I've seen. First off, while you can get away with this, it is very frowned upon. I mean, if everyone did it then they would either start charging for hotel parking or just up their room rates that much more.
And second, Downtown Disney no longer has buses that go directly to the parks for this very reason, so if you wanted to try and work this system, you'd have to take a bus from Downtown Disney to a resort, and then transport from the resort to a park. Again, frowned upon plus somewhat time-consuming.
If you are flying down and only doing Disney, staying on Disney property and not using a rental car is probably just a little more expensive than staying off and paying for a rental car. If you're driving yourself, then yes, staying off property is probably the way to go.
Be sure to buy your tickets from an online ticket broker too, like ticketmania or something. The mousesavers email lists a few websites and they are always cheaper than Disney prices.
One other thing if you need to save money here and there is that some counter-service meals in the parks are too big for one person. My wife and I, on occasion, would split 1 meal between us cause we just couldn't eat that much food. The dining plan (if you're staying on property) is great, but really only if you eat a lot of food to begin with.
Enjoy your trip.
