2 Day Trip over memorial weekend

I’ve been researching for a fair amount of time now and just want some final ideas on my upcoming trip. I arrive in San Jose on Sunday May 24th and plan on leaving early that Monday morning (around 4 A.M.) to get to the park around 7:30 or 8. I’m physically fit and wanting to spend as much time as possible hiking. I’ll pack food and water of course.

I am looking at possibly car camping off of the Hardin Flat Road over night and going back into the park for day 2. I think 7-9 hours of continuous hiking each day is extremely possible for me. I keep looking at the AllTrails app to see if I can figure anything out but it just confuses me more. If anyone has experience and can recommend exactly what I should do that would be extremely helpful.