Brandywine isn't a very good smallie river IMHO it doesnt have enough of the rocky area's that smallies love . Just find the area's with current and rocks and you will find them . Their is some biggins in there though the Delaware state recond was caught in there yet again Delaware has very poor oportunities for smallies .
Call Terry peach he could give you some nice areas to go he spec ializes in the Brandywine . You could always float the river it would help you find plenty of fish . On a plus side their is some lunker sunies in there and you will have a great time fishing a popper to them . Marry Kuss at the sporting gentleman also knows about the river she floats it often