I would suggest that you may want to put "Civil War Research" and not mention relics. Relics, I believe put people off unless they have granted permission before. I usually approach landowners with the question "do you know anything about the history of your land" and identify myself who is interested in Civil War history of the area. Sometimes I am given the names of local historians who can really get you on good places doing this.
Since I publish CDs and Books, I sometimes give landowners copies so they can see what I do. It doesn't hurt to share a shot .58 or two with the landowner, either. He will have bragging rights with his buds and you name and reputation will spread locally. THis often makes access to new areas easier.
Well that my 2 centavios.
Dave Poche