What, are you just planning on hiking around in there, or have some objective in mind?
That place is steep, hot and dry as a bone. Not many trails to follow. It's mostly cross country hiking. Keep in mind B zone archery opens this weekend I believe. And the Yollas is a B Zone mecca. Also deer season is just around the corner. Shouldn't be any problems with that other than you may run into rifle toting company.
You can get maps from USGS. There are not many places to get water and the rivers that are there tend to be down in steep ravines.
Major drought year. Reliable water in normal years may not exist. I am only familiar with access from Sacramento Valley above Paskenta and Hwy 36. Can't help with the best map but I usually find what I need doing google/bing searches or in the pre-internet days of just heading up there and figuring it out.................I am more familiar with Ides Cove Loop that gets you into the southern end and the shortest access to South Yolla Bolly Mt also known as Mt.Linn, the highest peak in the range. Spring and Fall are best. You're gonna roast this time of year...
west of the summit of Mt Linn/South Yolla Bolly looking east past the grove of Foxtail PInes. I threw this one in just for the hell of it. Cool place. No people.
Lending library protocols went into effect in my house. Names, dates, expected return date (liberally applied) were put on a card and slid into the shelf. Years later I got them back. Would have been goners otherwise.
we did travelers home trail on memorial day this year, 5 miles in 1500 feet up 800 down in a half mile. Brutal but lovely, tons of flowers, tons of poison oak. Hell, we had an 11 yr old beagle with us!
But yah wait tip fall or spring, it's pretty hot out there>