Sounds like tyeeterror has a good system. I'll just add as for anchoring or easiing your boat down, that would depend on the size of the hole and whether you think it holds fish. If it's a small hole that's marginal you may just want to back through it a time or two. If it's a small hole that looks good, I'd probably anchor at the head if I could and back my line through it over and over. Cover as much side to side as you can.
In larger holes you may loose line control if you back your line down too far. Lots of line out may deaden the feel of grabs and may create a lot of belly that will make it tough to get a good hook set--especially in swirly chinookey holes. So it may be better to back the boat down for a longer controlled drift then row back up.
Good luck