I haven't been paleo for very long myself yet either, but I was thinking
about what I'd do if I were in your shoes, going on a road trip.  I've found
quite a few foods that I can eat without any problems, and I usually carry a
little zipper baggie of something easily transportable around with me, like
fried strips of uncured bacon, or raw almonds, or "Paleo Cookies" from the
PaleoDiet Recipe pages at http://www.paleofood.com/baked.htm.
(Sort of an aside, does anybody know if hard-boiled eggs need to be
refrigerated?  I just love hard-boiled eggs, but I'm not sure if they'd be
okay to eat after I carried them around with me for half a day in 95 degree
heat.)
Maybe you could stock up on whatever foods work for you and aren't likely to
spoil or need refrigeration.  And then you could take some of your paleo food
in to restaurants with you, to supplement whatever edibles you find on the
menu.  I agree with whoever said that trying new restaurants is often a lot
of the fun of going on a road trip -- and this way you'd still get to do
that, and your hubby would get to eat whatever he wants, even though maybe
all you'll end up ordering from each new place is a side salad or a poached
egg or a side order of steamed veggies.
Good luck & have a great trip!
Kathy
P.S.  I've really enjoyed hearing about your story and your successes, too.