I just installed manual wipers, plus a washer nozzle that shoots a fan-shaped spray onto the windshield, high up. So I figure I'll use that on the trail, and after washing at home I'll hit the windshield with the Pledge.
Except I also ordered a bottle of Rain-X for plastics, and now I can't decide which would be a better idea: Rain-X to hopefully cause the water to bead up and roll down the windshield better, or Pledge to hide the mini-scratches.
When the windshield is actually clean, I don't seem to have much or a problem with scratches, so I will probably start with the Rain-X and see how well that works, and keep the Pledge wipes as a backup.