Yahoo Maps will help with driving instructions to get you to the lake but after that they are kind of vague. Note thsi only show you where camp is located.
From Redding I-5 to Hwy 36
Take Hwy 36 from I-5 Red Bluff to Chester turn on to Hwy 89 towards Canyondam. Once you pass the dam heading south on the right you will see the old PG&E camp and on the left a Forest Service Picnic area. On the right, one block (street) further is Seneca Road.
Just off the left, as you turn on Seneca, is the road to Sierra Bible Camp. (Look for the camp sign.)
From Sacramento take Hwy 70 to Hwy 89 towards Greenville, then on to Canyondam, just pass Canyondam is Seneca road turn on to Seneca Rd. you wil see the camp signs to camp.
Please drive slowly because of ruts, dust, and people on the road.