Greetings, Sarah!
Welcome to the wonderful world of runDisney! I am so excited to hear you had a great experience during the Disney Princess Half Marathon. I am especially excited to hear you are already planning your next runDisney event.
The Disney Villains Hollywood Bash is a post-race party for participants of the Twilight Zone Tower of Terror 10-miler and their guests. This exclusive opportunity will feature access to some of Hollywood Studios most popular attractions, like the ones you mentioned above. In my experience with this race, attraction lines are initial short early in the bash. In fact, Tower of Terror and Rock 'n' Roller Coaster were walk-ons. However, as the evening wore on and the race portion was complete, lines did begin to build. Toy Story Mania reached an hour wait at one point, which is still considerable shorter than when the park is open to day guests. Official hours for this villainous bash are 10:00pm-3:00am.
This is such a unique nighttime race event, I have no doubt you will have a great time. I hope this information is helpful, Sarah. Please do not hesitate to ask any additional question you may have.
Have fun running in the 5th dimension!
Faith