After moving into the new house, I have a 12' x 21' unfinished garage I can use for a layout. It is a wood framed building with t-111 walls on the outside and a truss roof. I just started putting in insulation in the walls, and will drywall them, but am unsure about the ceiling. I have trusses spaced 2 feet apart. Should I drywall ceiling too, or put in a drop ceiling? Which is easier, warmer, etc?