Just a few thoughts.
Unless you ride Peter Pan first or happen upon it when it is just coming up after a closure and people haven't realized yet, then I think it's pretty unlikely you are going to find less than a 20 minute wait for it. Forty is what I see most commonly, but I think 30 minutes could be a realistic possibility too.
That RSR single rider line is highly variable. I have heard of times when it took only 20-30 minutes through the single rider, but I have also heard of times when it was a 50 minute wait. We haven't tried the single rider, so I am only reporting second-hand.
Soarin' single rider can also be one of those waits that is unexpectedly long. You might almost do better with fastpass if you are able to get one.
Goofy's Sky School doesn't always offer single rider, so it can't be absolutely counted on.
Toy Story Mania typically has lines of 40-50 minutes during the afternoon on busy days.
Thanks for these notes. Based on this information, how would you edit my itinerary? I would be OK passing on Peter Pan since I've been on the WDW version many times and it's not my favorite.
-- by 7:30 AM. I'm driving from Indio Valley and am considering leaving late Sunday night and stopping at a rest stop over night. Or, I'll be departing Indio at 5:30 AM.