We got a Nintendo DS a couple of years ago and have had no problem with the games. It was a bit cheaper but it is probably worth checking what prices are like before you go.
If you buy an adaptor for the plug you should be ok
NOOOO, they used to be region free but the newer 3ds ones and the new games are region speficic (sp?), im not sure about the new normal ds lites....???
You can check store websites to check on prices and availability. Walmart.com also has a 'site to store' delivery so if you have a PayPal account, you could order the DS Lite and then pick it up at a store local to where you are staying at in Orlando. The only thing you have to watch is the delivery dates, they will give you an expected date to reach the store and will then keep it for up to 14 days after the store recieves it.
The DS Lites are compatable with the UK games and also you can pick up a charger in the UK which will work with the DS Lite.