We go west every winter for 3 months. Found many arrowheads, manos, matate's and pottery shards. We also metal detect. Found several pre-1870's 45/70 and 45/60 casings, mules shoes, pony shoes and old horse shoes. We find an ocasional military button. It's always fun as the kids love to go through our "stuff" that we find.
Went to a world war one encampment and found many rifle casings and some french machine gun casings. I did locate a 1910 seated liberty dime once in that same location.
We never leave home without our detectors in the truck. I found an old trappers cabin in the U.P. of Michigan once and found 9 wood ticks all over me during the course of two days so you do have to be careful!