Pretty straight froward for the most part. From what I've read, OC can be argued both ways. There seems to be some contradicting info in the way the laws are worded...Hopefully, someone else will chime in. That being said, there's an old fellow here in town that wears a full size Beretta or a big ole revolver, cross-draw in plain sight, no cover shirt and he never get's any flack.
I've never had any encounters w/ LEO's concerning CC. I don't believe you have to notify an LEO when stopped, unless asked. (but I intend on doing so anyways). Here's the MHP's FAQ's on carrying. BTW, what part of MS are u visiting?
Firearms Permit Unit - > Firearms Permits FAQs