Yes, you can make reservations at www.recreation.gov or call toll free 1-877-444-6777.
They only have one spot with power and it's First come. I have to have power for my oxygen. Before I got sick I would go on Thursday to get a good spot. I hate they took the 2 spots that were beside the river. That's where I always stayed. I'm afraid to go there now because I have to have power. Really Limits where I can go.
You can reserve some of the spots. Not all of them
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