Puppy in the Plane?

Tomorrow (weather pending) or next weekend, we're probably taking the RV-6
to just north of Little Rock Arkansas to look at and probably buy a puppy.
Yeah, I know, there are plenty of puppies locally, but my wife is on a quest
to find a pup with the same bloodline (or at least some of it) as the dog we
lost last week...

Anyway, I've built a foam lined box (with airhole) to put the puppy in
because of the noise in the RV. Hopefully the enclosed environment and foam
will help the noise. Also, the box should catch any pee if the pup has an
accident.

Anything else I should do to protect the pup?