Will be driving large motorhome with towed car from Wash DC area to Niagara Falls. We would like to see a little of Gettysburg, Lancaster Co, and Hersey, but not theme park. Could we stay in one central area and see all three? Would one day be enough? We would be driving in from Wash DC and wonder if that day and the next would be enough to get a good taste of these areas? Two 60+ and no kids.