2nd car opinions

My 67 Dart is the only vehicle I have at this time other than a motorcycle. After 8 months unemployed now back to work on a 2 week on, 2 week of schedule. Only thing is it is a 10 hr drive one way. did it with the Dart this time, but would like to get another vehicle for the every 2 week work run. Have approx. $5,000 to spend, what would you recommend for a good reliable driver? Would like something that rides good, the roads in Louisiana can be rough, comfort over mileage you could say, like low to mid 20's MPG. Was interested in an early Magnum wagon but hard to get one in my price range with fewer than 140000 miles on it. Also looking into maybe a little Toyota pickup, but kind of small for a long drive.