Imagine the adventure of flying one from VA to Oshkosh. The conversations with ATC would be fun!
I recall one Saturday at Tinker AFB when the airplanes for a big airshow were arriving.
"Hello, Ok city Approach Control? This is Tinker AFB Operations. We would like for you to relay a message to some aircraft that we have inbound. The aircraft type is a B-29 and a B-17. No! I said BEEEEE Twenty Nine! Yes! That's right. The message is, tell them to come straight in to the field and not wait for the P-51's and the other fighters."
I could imagine Ok City Approach replying, "Okay, who is this, really? You know this is an official line!"