Sounds like an nice adventure to me!

All I can offer for advice (I am not great with routes or maps),
is to get out of the car often, stretch, walk around some, so you
don't get a blood clot. Some PNs involve autoimmune issues, and and this can affect blood clotting and increase that risk.

I know from myself, that my long trip (8hrs) up and back to our summer place is highly stressful for my legs. So do get enough exercise and also stay very hydrated with water all the time while driving.

I tend to eat smaller but more frequently when driving long distances. I get junior portions at restaurants, and keep Zone Perfect bars for the car for snacks. I always have lots of water, and some Snapple diet for caffeine. (coffee gives me GI upsets).

I also think a marriage vacation can be helpful. For many years, I stayed alone upNorth for 2 weeks and sometimes 1 month periods when my son was younger and could stay with me. Sometimes I'd stay alone, when my son went back to school, and then hubby would come back in a week or 10 days and help me close up.
I found getting a bit of vacation from wifely duties very relaxing and helpful.