If you are street legal and plated you do not need to trailer. Wouldn’t worry about the permits. You can get in the wash at the corner of Jamaica and McCullough. (Next to Dollar General). Stay to the left to get up to Bison. Can follow the power lines for the most part to get to the Bunker bar.
Here is the schedule. They moved it up a week earlier. Looks like Friday-Sat winds 5-10. https://havasuballoonfestival.com/schedule-of-events/. You can watch from the channel around 8ish if you do not want to go to the event. Or fun to follow them around town. Looks like 57 are signed up.