I read here on the DISboards a few years ago that the Camera Shop at each of the parks will let you charge your camcorder and/or digital camera batteries as long as you supply the charger.
On our 2005 trip, I found myself at the MK with a dead camera battery. I have two Li-Ion batteries for my Kodak camera and would always charge one overnight to have ready if/when the battery in the camera ran down. Apparently the battery I intended to charge the previous night didn't seat properly into the charger, so it didn't charge. When the battery in the camera ran down, I put in the spare and the camera wouldn't power on. Since I keep the travel charger in my camera case, I remembered the advice from this board and made my way to the Camera Shop near Tony's Town Square. I asked if I could charge my battery and the helpful CM said yes. When I looked behind the desk, there were 4-5 other batteries charging, too. She wrote my name on a piece of paper (maybe a sticky note) and put it with my battery/charger. We went about our day and I came back in an hour or two and picked up my freshly charged battery.