Just got back, all as lorger says, rough under foot , but suits us fine and the ferry takes you right into town , if you want fancy , probably not for you but if you want somewhere to stay in Amsterdam City centre for 15 euros it's the dogs !!!!!!!!!!Hi we have stayed at the city camp mentioned above, it was ideal for visiting the city. Its a big car park Aire style place with a security fence all the way round, when we stayed there was no attendant you just paid at a machine.with credit or debit card. The machine gives you a receipt with bar code which is supposed to give you 100L of water per 24 hours but the barcode reader didn't work so just helped yourself to as much water. The price of €15 included EHU and wifi.
To get to the city you have about a 5-10 minute walk along flat pavements to reach the ferry, the ferry runs 3 or 4 times an hour until 10pm the twice and hour its free to use and takes 15 minutes to central train station.
I would personally use this site again.