have been to Disney that week...your best bet will be to check each morning you're there for what's available - I think you'll actually find quite a lot of availability. We're going to be there the weekend of 5/21-5/23 and have 6 reservations (dxddp) I've repeatedly changed those reservations (for 3 or 4 people.) Have not had any trouble changing things around (have been booking at Raglan Road, Kona, Whispering Creek, 50s Prime Time, Sci Fi, Wolfgang Puck Cafe) Have switched these around for different times, etc. And those lunch reservations were still available yesterday for Sunday May 23 in Hollywood Studios...which is also a Star Wars weekend there, so think you'll be able to get in some good places, especially if you're flexible on times. I can tell you that you'll probably have good luck at resort restaurants (non character meals of course.) I'd bet you can fairly easily get into places like Grand Floridan Cafe, Kona Cafe, Captain's Grill, Maya Grill, etc. We found park restaurants busy the last week of May, but resort restaurants were not as long as you're not trying to get into character meals.