Spent many, many summer vacations at the cape and in Ptown. If you take 6A into town and turn up the road that goes to the Pilgrim Monument, there is street parking up there, which may work for you as not everybody knows about it. If there isn't anything up there, at the end of the street there is a big lot where people park with rigs. Bring a fat wallet. Prices have gone through the roof over the years. Lots of NYC people/Boston people/ gays with expendable incomes stay in Ptown and prices are high. We stayed in N. Truro with friends at Corn Hill Beach for many years as well as camping there when I was a kid. There is no place like the Cape. I also recommend Arnold's for great seafood, as well as other items for the rest of your family. It's always busy, but don't let the crowd scare you away - they know how to move people through.