Mike,
I wish you luck on this endeavor but getting anything changed in this State borders on the impossible. I have released numerous keeper tog in RI in the past two weeks fishing for sea bass but my home port is CT, can't bring them back. I understand your thinking regarding cell phone pics/coordinates proving you're in RI but who's to say you didn't catch in CT, drove over to RI, took the pics and came back to CT. Would be really easy to do where I live and fish - Stonington. Many of the places I fish in CT are less than 1/4 mile from RI line as well as the NY border. Would be a hell of a lot easier if the seasons in the three states were the same.
Good luck with this, I hope you're successful.