I have an idea. Post a fake report about your river or spot a day or two before you plan on going. It would go something like this:

"The fishing was horrible! There musta been 75 guys out there and I only saw 2 real nasty dark ones on the bank. I talked tho an old timer and he said that the indians will be netting for another 3 days. But I did hear that the (fill in blank) river is real hot right now. I think that I am going to try that one in the next couple of days."

I know that it's a dirty low down thing to do, but hey, it just might work.
BTW- I won't be posting bogus reports.