Right at Jenner they have a few stalls with power,depending on what crews are there it may be full,just call the hotel/bar if interested.
We stayed just north of Jenner along the river last year,I know alot stayed at the one by Buffalo,depending where you want to hunt,we also stayed at the river along hwy 41 on the east side oh and hotel Dodge for several nghts...
If its anything like last year you want to be mobile,plan on about 3,000km of kidney jarring fun, as that block is big!! good luck!