I'm relying on childhood memories.
I recall the 'camp' starting at the end of Castle Street, where the tram tracks swing in front of the Sefton and Gaitey.

At this point was the entrance gate.
The wire extended back towards the pier as far as a Church - Parade Street Presbytarian ??

I can recall walking along the prom. Soldiers patrolling outside, civilian men milling around inside.

I believe there were similar womens camps in Port Erin - don't know if there were any in Douglas.