We just took a big Easter trip to Washington, D.C., which is actually a lot like a Disney trip in that you ride the Metro and then walk miles and miles each day on the National Mall, to restaurants, through the Zoo and Smithsonian museums, catching a ride on the Mall's carousel. (I lost 4lbs on the trip despite grubbing like a fiend!) My kids are 2, 4, and 7, insane, and only the 2yo still naps--and never in a stroller. We stayed out quite late for them, becoming those parents everyone judges for being at the restaurant getting dinner at 8pm. (The best/most popular Smithsonians stay open to 7:30pm.) We found that they just slept like rocks when we got back to the hotel. No need for stories, no delaying tactics, just falling into bed and sleeping until 8am, an hour late for them. It was actually pretty awesome, and when we did get back in our car to drive home (we didn't use it once while in the Capital), they all slept in their carseats, and then slept long and hard each night for the first four days back at home.
The excitement and adventure kept everyone awake through our days, and only the 2yo was a problem with the crankies, teaching us that at DL, at least one of us really will have to go back to the hotel to get him a rest, even if others stay in the park. Makes one of those Harbor motels seem more attractive.
GL!