Can you do anything about a trailer trash neighbor?

I live right on the water of a huge lake. My home is a duplex, and I am good friends with my eccentric neighbor in her 60s. There are no other neighbors.
My beach is constantly traversed by locals and tourists going from one public pier to another. I am embarrassed by the sight of my little beach because my neighbor has made it her own personal junkyard. We have 4 kayaks covered in pine needles and cones, two grills (one doesn’t work), a concrete fire pit with unburned trash in it, several folding chairs and towels and other random beach items all crammed under our concrete picnic table, all right on the water. It is the ONLY property on the lakefront in this cluttered and junky state. I’ve cleaned it up several times but she just tells me to leave the crap on the beach so she doesn’t have to carry it up and down the 20 steps to the storage at our place.
In addition, despite me complaining many times, she uses the small bank between the house and the beach as a compost pile. She throws oranges, bread, pizza crust, whatever, just over the deck onto the ground. Who does that?!? I’ve told her it is inappropriate to throw ANY trash into your own yard, and she just laughs. She says she figures some animal will eat it. I’ve been looking at a whole orange rotting by the lake by all of her trash for about two weeks now. Ducks don’t eat oranges.
She recently threw a dead plant, clay pot and all, over the balcony. I went and collected the shattered pot from the bankside.
She’s lived here for 12 years and doesn’t think any of this is wrong, or care if it is. I’ve been here about a year.
My duplex just got declared eminent domain so that the two public beaches can be connected come this fall. I am moving in September but want to enjoy my beach for the summer, and throwing food in the yard is beyond me.
Do I just grin and bear it? What would you do?