reduce the pressure per square inch exerted on the bark. Conversely, a narrow strap would increase the pressure per square inch.
While I agree with your statement: "the logical answer would be to install poles for hammockers to use" in these days of tight budgets we cannot look forward to extra amenities being installed in COE, USFS, NPS or State-run campgrounds. They are cutting back on servicing restrooms!
So my theory is to be a model hanger. ANd my New Years resolution is to loose weight. And to be the totally swell guy that I already be. (Historical note: "swell" is a term from the 50s and 60s denoting an OK person).