for the upper west fork:
it's class V. i don't have enough time on class five to say if it's V- or V. not V+ though. there are two portages due to wood. neither are obvious. i wouldn't go in without a guide.
the takeout: turn left just past Mariettas (sp?) Restraunt on hwy 40. drive a 1/4 mile to a vacant lot on the right below the beaver dam. (please be discreit as this may be private property)
put-in: drive up hwy 40 and park at coors falls, aka triple drop, a 12'ish drop. not too hard to find if you stop at every pull-out and look in.
for the lower west fork:
first, "clean" is relative. you don't need to portage. however there is wood. and second, once you join the clear creek there are two distinct raids before the lawson hole. one is under the I-70 east on ramp from hwy 40 and the second, i belive, is the afore mentioned "extra pussy".
-dan