well I'm not actively waving the gun around as if threatening to shoot anyone, and I only take out the gun at the convention space (kept in a duffle bag on the trip over) The general public is pretty accepting probably because they've seen a lot of weapon props at conventions, and a mere sight of someone with a gun won't automatically results in "he's got a gun, someone call the cops, screams"
Of course, there are times where I have to take the gun with me outside the convention (no place to leave it around) to get food. I sling it over the shoulder and have the magazine removed, can't be a threat like that.
Having an orange cap will reduce the chance of cops stopping me for an inspection, and more than likely to stop them from pulling their real gun on me. I'll play by the rules, but I certainly don't want to lose my life over a misunderstanding.