I knew some states required it my understanding was indiana did not, but better safe then sorry. Thanks big bulls it saved me a pm to ask you about florida.
As for the car lot I was torn, A friend who owns alot and who I bought a car from told me one day while we decisioned guns that a lot owner or employee was banned to carry a firearm on a lot or in the building, he said his understanding was no one could. SO I opted to remove it, lock our truck and go in. More so for the fact we were climping in and out of the trucks, I did not know the people there(all of which at this point I think would not have cared, and I did not want to alarm them since it was OC(legal here)
Still working out everything on carrying, I almost asked the owner, but think next time I will just carry and let them ask me to leave if they feel the need. The reason I left it back there when we left was we were heading up to a bank to get a check for the truck we bought. Can you go in a bank with a gun even with your permit?

My understanding is there is nothing in Indiana's law that say it can not be in your vehicle