WUZombies
Adventurist
Yeah, having seen the traffic jam that is Yosemite Valley I think this could have merit. The environment and the wildlife can only sustain so much 4 wheeled and bipedal activity. That whole are gets covered like bees on honey. It's as bad or worse than Disneyland on peak days.
That said, I DESPISE the entity known as "reserve America" and anything like it. I'm a spontaneous traveler and really detest needing planning and reservations for a weekend getaway to the woods.
That's why for our "big" trips we make reservations at the first available reservable date for the camp. It's a pain in the ass, but it does take some of the stress about finding and securing camp for the night after driving for multiple days to get there. We've done some dispersed camping, but right now we still prefer to hit national and state parks, it's easy with the kids and we know that certain things will be in place to in terms of infrastructure to help us have a pleasant camp with our little ones (Ages 7 and 6).