Changed my mind about driving up the hill, so I just booked a campsite. Camping details for my group:
Hanna Flat, site # 61 (right next to Sage Bromax and xxSVxx)
Friday night (9th) and Saturday night (10th)
4 adults, two vehicles (my Xterra and my cousin's F-150)
I won't be able to arrive until about 9:00 pm on Friday night, (stupid work, always getting in the way!), but my cousin will show up about 6:00 pm and set up camp. I'll have to head back down the hill Sunday afternoon to pick my kid up, so we'll break camp Sunday morning and make a short trail run before departing. Won't be able to participate in any Monday activities, unfortunately.