Have you prospected the river yet? Is it known to be gold bearing?
Does look like a great area, but before you go dropping a sluice in
there you might want to check with BLM (or the LR2000 System) and
insure it's not claimed.
Do some (OK..LOTS) of research on the area. Has gold been found there
in the past? Was it lode gold, or placer out of the river? Are gemstones
know to be in the area, too?
FWIW, I've found hundreds of "great looking spots" with Google Earth,
HOWEVER, that doesn't mean for a second that gold exists in those
locations. It might be a great place to start looking, and if you find
good color then work it, but ask any "old timer" and they'll tell you
it's always a crap-shoot at any new spot.
Do the homework, and if it still looks good then definitely get in there
and check it out!