As for wait times, expect the worst... really. DCA's Soarin' can get a 2-3 hr wait without trying. Expect FP's to be gone very quick in the day. Also they do have a singles line. DO NOT use the singles line. I am not kidding about this folks, rarely will the singles line be shorter. On average the DCA Soarin' uses only 1-2 singles per show, so maybe 15-20 per hour if you are lucky. They have tested the singles line here at Epcot and it was over a 3 hour wait! Singles has not been open since that day. No word if they are planning on opening it back up.
Also if you are in an ECV, try to transfer to a wheelchair before entering the line / The Land Building. All ECV's must go in row 3 (lowest row) due to the tight turns in the que.
Hope that helps some of you in planning.