Come out West and hike up an avalanche chute then with your lungs burning at altitude and your quad muscles twitching you can transition onto the alpine tundra slick as snot from a recent frost. If at that moment of reflection as you are tumbling down the incline you open up to learning new techniques, is best to apply the tape prior to your barrel being damp.
I think flatlander hunting where you return to a warm bed that night to flip on the tv and pull out your cleaning kit is not the norm out West where often you are returning to camp after dark to try and get some grub in your belly and a few hours sleep prior to the next morning. A thorough cleaning is a dream and means a bit less sleep and more things to pack on your back to base camp.
If I am tumbling down and incline as you say I would worry less about stuff getting into my barrel at that point. I guess I should have said for how I hunt I don't see the need for tape.
Ok if I go out west I will think about putting tape on the end of my barrel, but I am pretty sure if I go out west I am going to be carrying a bow.