The gunbuster signs are law, if you go into a posted place, its criminal trespass, no ifs ands or buts about it. Must notify if stopped by law enforcement. May carry into rest areas, but as it stands now, not the ones that have tourist info centers (that could have changed, but I am giving you what I knew correct 2 months ago), Do not carry into anyplace the serves for on premise comsumption of alcohol, bars, places like Applebees and the such. Basically, if they serve, its a no carry zone, even if not posted.
Have fun, spend tons of money and take some of our Buckeye Nation stuff back up north