It's very big, and has attractive stands of Corsican pine (Scots pine would be nicer but I've noticed the FC often planted Corsican on coastal sites).
Might be a good place for a small group 'wild camping' under the new access legislation. Car park closed at night I think, so a walk-in might be needed.
Although normally ok to light a fire on the foreshore, it might be subject to byelaws. Certainly the Eden Estuary is a local nature reserve and fires not allowed.
I wildfowl on the Eden and it is possible to shoot the north shore from Tentsmuir. Closing dates for (free) permits is end of the month.