You tip for a scenic route? Personally, if the van driver shortens my overnight so they can show me the "scenic" side of Cleveland, I don't think I will be tipping.

But as you stated, the important thing about tipping is to get the van driver to associate your airline with $ in their pocket. That way when they hear that we need a pickup and they just left the airport, that van driver will do a 180 to get us even though it will cause the Southwest crew already on the van to get upset