I live near the river trail and love to wild craft from the area, as well as around the downtown area, especially municipal flowerbeds in the fall.
In the past I've collected seeds for blackeye susans, echinacea, lambs ear, and other plants that my tax dollars bought and will be ripped out for the winter. I also go over to Wally World and cut sumac seed heads for sumac lemonade. They have about 40+ planted as part of their landscaping. There's also a small bush with red pones that I liked but have since learned that it's cottoneaster, which is poisonous.
In the spring and early summer I go around the county and cut green phragmite reeds as fodder for my
rabbits. The state has given me permission to cut down as many as I want since they consider them a noxious weed. But like I told them, some of the reeds are native and not invasive while the others I'll cut or pull. They don't care as long as I burn any seed heads and rhizomes. They also make great mats to act as windbreaks during the winter and shade during the summer.
Free
pallets all around town, but I only grab the ones marked HT (heat treated); brazillian cherry posts from a tile and counter company; plywood from cabinet companies (prebuilt cabinets get shipped in plywood crates); free
wood chips delivered from an out-of-state tree trimming company on gov't contract; growing pots from landscaping companies:
coffee chaf from a roasting company that I mix with wood shavings from
local wood turners as litter for my hen house floor (can't use that for my rabbit litterboxes cause they want to eat it). Oh, and free manure from horse stables when I build hugels from broken pallets, free tree trimmings, and cabinet shop waste.
There are tons of resouces out there, just keep your eyes open.
Happy hunting
Raine