It is a simple matter to mount two auxiliary taillights that are not obstructed by the bike rack if someone thought they were necessary. We use the Airstream rack and like it very much, the factory Airstream taillight visibility is fine. We don't use a cover because the bicycles do fine outdoors during travel and while in camp. The interior of our Airstream is for us.
Doug and Cheryl
2012 FC RB, Michelin 16, ProPride 1400
2016 Ram 1500 Laramie Crew Cab 4X4 Ecodiesel 3.92 axles
The Truth is More Important Than the Facts