that's the sole purpose for me showing him my permit. i wanted the encounter to end quickly. yes, i was fully within the law even without a permit. if i hadn't had the permit, my guess is he would have disarmed me while he ran my license to make sure i was actually legally allowed to own/carry a gun. i'm sure he still would have suggested that get a CCW and conceal in the future, although i would still be under no legal obligation to.
Personally, I would not worry, you have not done anything wrong and as much as he would try to intimidate you, nothing would come of it. I would have simply said that I feel more comfortable open carrying. When he asked for the CFP I would have simply said I am not carrying concealed and that I may or may not have a permit (think Dave Ridley from Manchester, New Hampshire).
Remember, your right, when something is legal, it's legal, if they try to push their opinion on you, remind them kindly that they are law enforcement, not opinion enforcement.
I've open carried once in Clark County and I had no problems whatsoever, besides an old guy staring at me while I pumped my gas.