Assuming, it's totaled and you are in good financial shape, I would pop out and buy another truck. You are going to need one anyway.
If you aren't in good financial shape, I might hold off on the trip.
Now if it's minor damage, the question becomes is the truck safely drivable with little or no work. If it's just some sheet metal pushed up against the tire and you can pull it back and secure it, I would call the insurance and run it by them that you plan to head out and will work with them to get it fixed when you return.
"Trips of a lifetime" are a lot easier to come by with a little planning than you might think.
