Now that you're both retired, do you want to spend more time with your spouse? A lot more time? Think about becoming an over-the-road (OTR) truck driving team. You'll be spending all day together in the cab of a tractor-trailer, you'll get to see the country (though with an emphasis on the interstates) and you can make a good income. You'll be able to put in as many as 5,000 miles a week -- and you get paid by the mile.
Companies often prefer couples as driving teams, because they're usually willing to stay on the road longer -- no need to go home to visit a spouse. Alternatively, you can invest in your own rig and become owner-operators. In either case, you'll each need to hold a commercial driver's license, which may mean going through a training course. And you'll have to tolerate some physical activity, such as climbing in and out of the cab, as well as prolonged periods of sitting.
Before you're seduced by the lure of the open road, think carefully about the drawbacks. Do you really want to share cramped quarters for days on end and be away from friends and family for extended periods of time? Deadlines and unexpected events, not to mention bumper-to-bumper traffic, can ramp up the stress level.