I remember reading in a pamphlet on car camping to put a sousaphone on your picnic table if you need an anti-personnel device. About 1967 while camping along the beach just no. of Vandenburg AFB (Point Sal Beach) there was very little space to camp. Another carload came down the narrow dirt road to survey the situation. I quick pulled my trombone out of the case and started to practice.....real loud. They actually rolled up the windows, the kids noses pressed to the glass. When I took a breath with the people looking on, I yelled at my buddie Arnold to, "get out your squeaky clarinet and let's play some duets." The car load beat a hasty retreat and we had the place to ourselves. As an aside, two years later, I did play 38 years with the L.A. Phil as their bass trombonist. It's just one of those implausible situations that begs to be taken advantage of.
regards, as always, jefe