There are some good access points from the bank, especially this time of year when the river is down... Elkton has good bank access, and there is a park nearby (off HWY 138), I believe its called Tyee park (please correct me if I am wrong).
Also the second bridge off of HWY 138 has good bank access from what I hear, but I have never tried that one out first hand.
Either way, your probably going to kill 'em, the Umpqua is the greatest for smallie action...
Good luck and let us know how it goes