Camping at 5 mile Saturday, suggest to me a good place to set up

[85CUCVKRAWLER]

Im going to the B.O.A.R. trail clean up saturday morning at 5 mile and the wife wants to camp as the weather looks to be low 80's. I will have limited time to set up the pop-up camper before the event starts and was wondering if someone can direct me to a good spot off the valley floor. Here is the set up

 

[Johnny Quest]

if i'm camping out there, i wanna stay away from people/vehicle traffic, Id probably end up on the south side of the road (73), and to the east of the old railbed