We went to Anguilla one time, many years ago, with Junior. To give him a break, we hired a driver with a van and I was appalled at the trash she tossed out the window as we were driving, having "refreshments and snacks".

I usually take a bag with me to Mullet and whatever I take in, it goes in the trash there if available and if not, I take it back to wherever I am staying.

Sadly, a lot of the locally generated beach trash is on the locals themselves.