If I buy the Woodland Scenics Grand Valley HO set, would I have to use DCC power for the track or what kind of power would I be using?
any ho layout may be powered by either dc or dcc. the track configuration is irrelevant to the control system.
I recommend DCC my friend who is building a BNSF line didn't need one and I got it even though I don't have a DCC engine yet but I recommend DCC
You need dcc if the turnout switches use it, or if you own one of the few dcc only engines.
Or Turntable