If the land was not posted then in my opinion you were definately not at fault. The way I see it, if this outfitter does not want people on his land then it should be properly marked. He had no right to get hostile with you. He should have told you nicely that you were on his land and asked you to leave nicely. Now if he caught you back a second time it would be different. Hopefully things will work out for you. Let us know what happens.

Shane