Great ideas for swag! I have had fun finding stuff from Walmart, Target and dollar stores for swag. The bandanas are favorites of mine. I put each one in a baggie so they stay dry. Baggies of different sizes are in my pack for things such as batteries (I do leave batteries sometimes, though I know they can corrode.If the cache gets visited frequently I don;t worry about it.) Now that cold weather is coming those hand and toe warmers would be a nice find as sox, little scarves or mittens. Regarding junk in caches? I don;t like to find junk any more than anyone else, so may do a little cache CITO and cache maintenance if a new log is needed. It helps fellow cachers out to replace a log if one is full, then you put that in your log. I like to browse antique shops with my hubby. You can find some really cool and inexpensive things in those places too.
TBs and coins are fun to find. I guess that is the adult find I really enjoy. You find a cool coin, learn about its goal and its owner, enjoy it for a little bit, then pass it along for someone else to enjoy.