I strongly suggest that both pilots wear uniform shirts with gold stripes. And both pilots have Captain stripes.
El Comandante!!!
I'm sorry, I coudn't help but laugh! The only way I see that this could help is going thru the security checkpoints, but please don't take it wrong. I just imagined them both being "epaulet decorated" for such a long trip, I think the burden would outweigh the benefits, plus unless they are flying a large ship I can only imagine two decorated guys flying an R44 in uniforms.
One important thing is have a binder with copies of all the documents such as permits, insurance, pilot's documents handy so you can give them away when needed.
Contact 3top, I think he just flew an R44 down to Panama.