Not the Poly. It's nice enough, but the GF is much more elegant and romantic in a Victorian Sense.
For something a bit more casual, yet with a beach and romantic in a seashore sort of way, I'd go with the Beach Club/beach.
It has a very New England shore feel, without the carnival aspects of the boardwalk.
Then again, there is a sweet little area of the grounds of the Boardwalk Inn called the Cottages. The gardens are lovely. If you are in the Boardwalk at the little lounge (the Belle Vue) at your back, you would take a left and exit a set of double doors (easily missed unless you know they are there) down a flight of steps into this lovely secluded area. I am so not a fan of the Boardwalk Inn, but this little area is very pretty.
The Wilderness Lodge has loads of opportunities for pretty areas, but for you Issy? I'd consider the grounds of the AKL. With your love of animals it would be nice to have the savannah and some of the wildlife there as a back drop, no? At least for some of the shots?