I agree with above post. We live in Northern Virginia, park in Frederick, MD not far from you in the big picture. Last winter was our first and we did the pink antifreeze. It wasn't too hard or time consuming, but takes longer than blowing out the lines and buying the antifreeze.
Last weekend, November 07, I only blew out the lines. Seemed to work well and we will try this as we're going on a week long trip to Georgia at Christmas, so, like you didn't want the full winterizing.
Since I didn't really trust my compressor fully, I made a little setup with a ball valve and pressure gauge from Lowes. You can buy adaptors from RV suppliers for about 6 bucks, but I wanted better so built my little deal with a water hose connector on one end. I connected my drinking hose to the RV, and the other end to the adapter I made. Its set so I can see the line pressure BEFORE opening the valve to the RV so I don't risk overpressurizing the system. Worked great. Closed the heater bypass, opened all the valves everywhere one at a time, drained tanks, etc.
I hope it works but believe it will. Good luck.
John and Caren, Arkansas. 2006 Newmar Cypress 5th wheel. "Fractured Fairy tails"