I think I want to start carrying a couple of heavy-duty trash bags around in the back of the car in case of compostables. For example, today we went to the Maryland Sheep and Wool Festival, and the field they had people parking in had been mowed, but the hay wasn't gathered, and it was pretty thick on the ground. I'm kinda nuts for compost, and it hurt my teeth to see all that good organic material going to waste. Or another example--I was just looking through old pictures on the computer, and came across our shots of the tractor-powered sawmill, giant pile of sawdust in the background. At the time, I wished after that sawdust pile, and seeing it again, I still do. I like finely textured mulch to go around my garden plants, and I'd be quite happy to experiment with sawdust. My understanding is that, so long as you put down a little nitrogenous material underneath it, sawdust is fine stuff.
Anyway, I think I will. Most people think that compostables are trash, so they're free for the taking most anywhere you go. Might as well be prepared.