They went this morning. Here's how it went:
They got through the gates right after 8. Went to Space to pull FP, but it was down. Went straight to Matterhorn. No one was at single rider so they went straight on (DH: "Man, that ride is a teeth rattler!"). Went back to Space -- it was open and they walked straight on. Over to Star Tours, waited 5 minutes (and DS's friend, who is rarely able to go to Dland, was chosen as the rebel spy!).
Went and grabbed FP for Indy -- It was around 8:50, and FP was for 9:40 - 10:40. Rode BTMRR (ten minute wait). Walked on to Pirates. Indy down.
Visited Haunted Mansion, no wait. Went to Splash intending to get FP but instead walked right on. DS commented that when they got off, the line was building up.
Then headed to have a Dole Whip at the Tiki Room. Strolled over to Small World, walked right on.
Ate lunch (this is still before noon).
Circled back to Indy and it was back up! Success!
Then visited Pirate Island. Left Disney at 1:30.
So considering this was a Sunday during the summer, pretty impressive! Thanks to all of you for your thoughtful comments. I think going straight to Matterhorn was key!