So just FYI to forum members over the years we have had constant pressure on both rivers between 15-25 user groups per year i.e. depending on water level etc... This year has seen a significant increase and by significant I mean on Birch estimated 35 user groups, Beaver 30 Plus and I want even try to guess on the Wood River not to mention there are 4 guides working the River this year versus the normal 2. I would assume the Harvest of animals will be Maximized in 2014. For strictly planning purposes please consider this for 2015. I am not stating not to use the rivers for your enjoyment just that you may find more company then in previous years with lower harvest-able animals. Mind you this is my opinion and you should check with the ADF&G concerning the science of it all.
Most float hunts IMO should be based on the event however as always there are expectations to be met or exceeded however concerning the following rivers those standards should be lowered based on user groups over the past year.
Best of luck!