Free!!

There are public buses and pickup trucks along Sukhumwit road from Pattaya to Sattahip and further to Rayong. You can easily flag them down. At he time of our visit no permission was needed, just turning up at the gates of the military base and being ready to leave an ID with the guard was enough.

No, you don't need to make a reservation. But due to the fact it is on a naval base, you must stop at the guard house at the entrance. There they'll simply ask for your ID and how many people are traveling in the vehicle to enter into their log book and give you a pass for the vehicle you're traveling in. When you leave, stop at the guardhouse and give them the pass to be signed out.