That should be the link to the Independence Municipal Codes. If it doesn't work, use this http://www.ci.independence.mo.us/CityCode.aspx and click the "view codes" in the middle of the screen, should open it for you.
Welcome to the Forums, there are a few of us here from Independence, and yes, Open Carry is generally accepted, however there are still quite a few businesses that don't seem to want our money. I still tend to conceal more often than open carry, but I'm pretty comfortable either way around here. I haven't tried OC'ing in Blue Springs, though I hear its good to go there, as well as Grain Valley and Oak Grove. Not sure on Raytown, though inside actual Kansas City, Missouri city limits you're also good to go.
Hope you continue to hang around, there are a lot of good people here that are trying to help further citizens rights in Missouri.