Stay in a Disney resort. Transportation to and from the parks is easy and buses run from the front of all resorts every 15 minutes or so. All-stars are good deal for the money. Pop Century is fun for the kids too. Hopper passes are a must, if they still call them that. Its been a couple years since we have been.
If you have small children, the Contemporary Resort is nearest to the Magic Kingdom park. It's also close to the ticket & transportation center where you can switch monorails to Epcot.
If Epcot is where you'd prefer to spend more time, check into the Boardwalk Inn, Yacht & Beach Club, Swan or Dolphin Resorts - those allow you to walk into the rear entrance of the Epcot park. Those are all generally a better deal than the Contemporary, the Polynesian or (*gak!*), the Grand Floridian. Depends on what deals are currently offered.
The transportation system really is hard to beat, even if you stay in one of the off-monorail resorts.
And RangerM, let me be the first to say:
“!Por favor, manténgase alejado de las puertas”
You'll understand, after you've been there.