The fort itself is a little underwelming, visit Newhaven fort and you will see what i mean. That said its probably relatively early days for the group running it and with a lottery grant! and decent council support wonders could be worked. Good for the children doing a local history project. Its probably a half day out what with watching the boats come into the harbour and a paddle. You could make a full day by using the beach which is a short but uneven walk away(not recommended for chair users). Sea Fishing off the harbour arm is by membership i believe so google first to find out. Fishing from the beach though is free and its a long beach! Parking can become full quickly on bank holidays and weekends but mid week you should be fine. There is extremely limited on street parking close to the fort.