Our experience was awesome. We had checked in when leaving the park around 2:30 and it only took us about 15 minutes to get our wristbands. We did notice though upon returning around 8 that the check in line was crazy long.
Right at 9 when the event officially started it did seem very busy with Space Mountain posting a 60 minute wait time. But they were actively checking for wristbands and did not allow people without them to enter ride lines or even shops. They were constantly checking wristbands for at least an hour, even when we were entering the Golden Horseshoe. But the crowds really thinned out after about 1/2 an hour and within an hour we mostly walked on or nearly walked on rides incl. Indy. Big Thunder was our longest wait at 15 min.
All the rides were open throughout the park, incl. ones we thought they might close like Casey Jr, Canal Boats and the
Mark Twain. All shops were open and many restaurants.
Our highlight of the night was going to Main Street about 20 minutes before the parade and getting a curbside spot. Love, love, love Paint the Night!
We saw Jafar (waited 20 min while eating our dole whips) and did 2 picture spots (10 - 15 min each.) We ended up in Fantasyland around midnight and rode most of the rides, all walk-up to under 5 min wait incl. Dumbo and Toad. The exception here was Pater Pan which had a long line (we skipped.) We ended our night spinning under the lanterns on the teacups. It was perfect!