My son-in-law is a Indiana state trooper, I just recently ask him this same question. He wasn't sure so he called the head man in the licensing division at Indy and ask him. He said if your out of state license allows you to open carry in your state you can open carry in Indiana, if yours is for concealed only then it is concealed only in Indiana.
I was told the opposite thing by an Elkhart Sheriff's deputy Its Indiana law that prevails, and an out of state CCW would be treated like a LTCH, and fall under Indiana's laws. Anyone have a third input? I hate conflicting information like this!
**Edit**
I will add it to my list of things to ask when I visit the local State Police post, and see what my local State Troopers have to say. Who knows when that visit will be though.