You need to think about this in a practical sense. Such as when you conversing with fellow Paulites. How does it roll off your tongue during general conversation. For example, I cant' imagine ever saying "What time will Up Yours MSM arrive in DC? You see, it just doesn't work well in normal conversation. People would instead just say "What time will the blimp arrive in DC?" On the other hand I could easily imagine people casually saying "What time will Mr. Blimpypants arrive in DC?" And I must admit I like how it is almost impossible not to smirk when I say Mr. Blimpypants.
The blimp was owned by an areal advertising company and I assume is still being used in that business. The banners that were on the side of it have been stored somewhere. I remember something about hoping to use the banners again in the future.