To quote a meme using a different Joker: "not sure if serious."
Reminds me of the Londinium episode where Bruce says they've packed 1000 works of literature, Dick's biological specimens and his personal desk. Dick: "Yes, I expect to get a lot of studying done." Inside, he's about ready to burst, I'm sure.
The desk, specimens, and literature they took to Londinium was the cover story for the "portable" Batcave.