It has been a while since i was at doren but i think the trees were fairly spread out. if you want a place in norcal to go that has great trees for hanging go to china camp. admittedly it isnt the greatest campground, but it is great for hammocking. and if you live in marin/sonoma/napa it is only 20-30 min away.
only other decent options i have found required some stealth camping... probably not what you want to do with scouts
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