This may be where my comments seem to be misdirected. When someone says PFD and aviation I immediately think "big water". My typical flight was a long duration flight 60-100 NM off shore. In another life we essentially flew between islands and from shortly after take-off to final approach we were over deep water.

For overland I'm thinking pocket carry for essentials (PLB is on person) and a decent sized backpack duffel or a nomex flight bag for the rest.