Last time I flew, I put my belt and my holster in my carry on bag and sent it though X-ray. I wasn't going through the nudie scanner (for principles ... not modesty) and so I was pretty sure I was going to get the federally mandated molestation. I didn't want to have to explain the holster. (I was also wearing my anti-TSA 4th amendment t-shirt.)
Once the feel-up was finished, I went right over to the chairs put my shoes, holster and belt back on in plain sight of all. But the main reason I wanted it was so that once I arrived, I was able to quickly retrieve my firearm from the luggage and rearm in the bathroom without fiddling with belt and holster.
Edited to show T-shirt image:
With the text of the 4th printed on the back.
... this space intentionally left blank ...