My daughter and I were also at HS After Hours Saturday night! It was a great time despite the drizzly weather.
We had hoppers so we entered the park around 5:00 for our SDD Fastpass and to catch the last show of MuppetVision 3D. After that we stopped for a drink and a bite to eat at Baseline Tap House, before some doing some shopping and seeing Fantasmic. By then the AH event had started, so we headed to ToT. It was dark, and the queue was empty, which was AWESOME! We passed through the library where the Twilight Zone TV clip was still playing. The ToT CMs were amazingly and creepily into their roles at the beginning of After Hours - LOVED it!
Next we headed over to RnR, again walking right through the queue and the preshow room and onto the ride. One time was enough for my DD, who said the ride was much bumpier and jerker than she remembered. By then it was drizzling fairly steadily as we crossed the park to Star Tours. One ride there and we headed to Toy Story Land. Rode TS Midway Mania a few times with little to no wait (they let us use the re-ride shortcut to avoid the queue). When our arms gave out from pulling the cannon string, we headed to AS2, which was over a ten minute wait. This ride was probably a one-and-done for us, it was bumpy and meh. Then we walked onto Slinky Dog twice in a row - still a blast in the rain! By that time it after 10:00, and still drizzling.
We headed back to ToT for a last ride, then decided we were ready to go, and exited the park around 10:45. Had the weather been nicer, we may have stayed longer. Nonetheless we were happy and satisfied that we had done everything we wanted, which we never could have done during regular park hours.
All in all we give HS After Hours a big thumbs up!