Welcome Chris, nice to see someone from my hometown.
Congrats on the boat, perfect for running the upper potomac. Been awhile since I fished up there, currently down in Germantown, used to fishing down here. Things to keep an mind though are get used to "reading" the waters surface for any slightly submerged rocks. And there is not need to run WOT get a good comfortable cruising speed and keep your eyes open.
As for fishing it, same basic things you looked for wading. Breaks in current, deeper holes, and eddies. Smallies like current but will hide behind rocks or hang along the edge created by faster moving water meeting slower moving water.