It’s been 6 years (?) since there’s been a race in DL so it’s kinda speculation, but I feel like I remember the parks opening at 9 with no EE on Sat and Sun. The 5K Friday probably won’t impact much, maybe only one park will have EE. The races start super early, 5:00AM. So the Friday 5K will be done by like 7:30 even for the back of the pack. If you are on property, especially DLH, you will likely hear fireworks every 2-5 minutes from 5-6AM. But it’s also possible they stop that due to the neighbors. It’s been so long its just hard to say.
In the past the half marathon has hit its park miles early which I’d imagine will continue so they can open the park. DTD will be a zoo until late morning/lunchtime on Sunday.
Parks will be light at opening and then very busy but probably not too bad late at night, especially Saturday.