I think the anti 2A folks from all over the country will be quick to point out any proposed legislation if it is about OC. regardless of how it is "marketed".
In my opinion we can't "market" legislation, we just have to be honest about what we want and educate people on past statistics: in this case that 41+ states have some kind of open carry, including several with constitutional carry, and there have not been any adverse effects at all. In fact in many cases there have been beneficial effects.
But such a petition wouldn't really be about open carry at all... it would be about removing a contradiction from the state's own constitution and get the state out of the way of the Second Amendment. It would be counter-productive to call such a petition an "open carry" petition.
Anywho... the real problem is that we keep letting the same fascists, statists, and socialists stay in office. Out of 101 House seats, 51 are uncontested. Out of 24 Senate seats, 6 are uncontested and 11 will be decided in a primary.
So don't expect any real net positive progress on the Second Amendment until at least 2015 in Oklahoma, or longer if we keep letting the two-faced scumbags back into the Capitol each cycle.