DD and fireworks?

ArcticFox

DH wants to go to the Great Escape tomorrow to see fireworks.  It is approx 1 hr drive and I think the fireworks are 9:30pm.

He wants to leave before DD's nap (the 20 month old).  She usually naps 2-3 hours, but in the car it takes her literally 45 minutes to fall asleep, and she usually goes to bed around 10.

I'm just worried that she won't nap, and then I'm dragging 2 grouchy kids around in the heat from like 3pm-10pm.  Every time we have tried to skip her nap, she hits a wall where she just cries uncontrollably and I have to bounce her like a newborn to get her to calm down/pass out.

Is it worth it?  Should I just send DH and our 4 year old?  The 20 month old has lots of fun, but every time we go, we go first thing in the morning and leave in the late afternoon, the kids usually fall asleep in the stroller or before we make it out of the parking lot..