I actually had an experience relative to this question. In 1972 I was a radioman in the Navy and sent to Diego Garcia in 1972. It is an island in the middle of the Indian Ocean, 27 miles long in a horseshoe shape and no wider than half a mike at any point as well as being close to the equator.
All I could take with me in term of music and audio was a small battery powered cassette player and a small carrier that contained 10 cassettes. The first one in the box was Live at the Fillmore. I should also mention I saw them play a few weeks before Duane died in the motorcycle accident. That box travelled with me for a couple of years until I got out of the Navy.
A couple more points, there were no permanent buildings when I arrived, mostly comprised of seabees building out the island, we had the highest rate of drug and alcohol abuse of any unit in the US military that year.
Bob Hope arrived on the first jet to land on the island and performed on Christmas Day that year. Temperatures easily got into the mid 110s and no A/C for 98% of the 1,100 men stationed there.