Bit of advice, even though you have an 8am time, you most likely wont be let into park until that time, then you have to allow for time to walk up main st, check in and if necessary, wait briefly to be seated....then you want to allow yourself time to enjoy CP....Pooh is great, but the CP is beautiful and the food yummy!
If you are travelling w/o kids, I would recommend and early opening day, watch park opening and then go to CP, say around 9:30? Then you will be out by 10:30 and probably wont need lunch and can catch some rides while others break for lunch!
PS.....if you go for 8am, go on a non-EE day......when they let you in, PS people are the only ones on Main Street....its a great feeling and a perfect time for photo ops, so take the extra few minutes to snap some uncrowded pictures of the street and castle before dining!
oooh, one more tip......DH and I are big kids at heart but never get to Fantasyland cause the lines are soooo long with the little kids, cause these are their favorite rides.....after out 8am PS at CP, the park had already opened, but the crowd was still walking down main street, so we booked it to ride Pooh, Carousel, Teacups, etc before the crowds got there!