i would keep an eye on the water temps. if we get warm weather the temps on the lower east branch will go above 70 and the trout will be stressed. there are tons of smallmouth bass in there from what i have heard though. so if the h20 temps are high there will be some bass that are there to play. i am sure that you will still find a few shad up there as well. of you want to catch trout then the west branch and upper main stem will be your best bet. if they are releasing water the fishing will be good. however, there will be crowds.
as for put in and take outs on the east branch.. i know that you can put in at the ball field right below the juction. you can either put in or take out at fish's eddy as well as take out at the firemen's field in hancock.