Isle of Wight early morning ferry

This is my first time here on club together and wondered if anybody had any suggestions what we could do about arriving on the Isle of Wight at 2am We have a site booked but cannot go there until late morning so we have between the hours of 2am to 10 or 11 to find somewhere to park up. I believe that there isnt much car parking at Fishbourne ferry port so we will have to ride around looking for a suitable place to pull over and get our heads down for a few hours. If anybody has any ideas or suggestions then i would be very grateful. I am so looking forward to our holiday but this is bothering me a little.

Thankyou