Sam D...
Thank you for all your efforts - and to everyone who helps keep this great place clean.
I do have a thought, and a suggestion, though, in the interest of inspiration to everyone who uses the place. If we all take a bag with us, pick up what we can carry - and then carry it all the way out - the place will always be better than we left it.
Sam, your efforts are great, but the fear I have is a pile of collected trash makes it look like somebody collects the trash down there. We just have to be careful not to enable lousy behavior. Frankly, it doesn't surprise me that people see a trash area and add theirs to it. Many of them probably think they're doing the right thing. Personally, I honestly feel better by picking up what I can find, putting it into my bag and carrying that (one) bag out. Since I don't carry anything which I would leave there, I'm way ahead.
Let's all try to get down there, pick up the bags that Sam has collected and carry them up. But, let's make sure there aren't (what appear to be) trash locations, either.