All kidding aside, Nascar has tear off plastic windshield protectors. It must be a sophisticated version of Saran Wrap.
Is there anything out there like the carpet protector film that can be applied to the front of the bus for long trips, and then just peeled off at the end of the trip?
No bug screen translates into a lot of work when it is bug season, and exposes the coach to dents and dings.
A POLYCARBONATE shield (bug screen and dent preventer) prevents the dings, but is an equally large PITA to clean.
Somewhere in the middle between none and cow catcher (couldn't resist) must be a solution that makes bug clean up easier and contributes to protecting the front from chips, dents and dings.