#1 Favourite key for portable: 1939 vintage military KEYWT8AMPMK2 mounted on steel block. Cheap, strong, reliable. Can be used to drive tent pegs in emergency.
#2 Favourite key for portable: 1950s vintage ex- Czech military . Cheap, strong, reliable. Internal switch gear removed and replaced by single wire so key can be adjusted with cover up, quicker in wild.
Favourite paddles for portable -not that I've used a keyer for a long time: old Hi Mound HK701 mounted on steel block. Beat up, bright parts rusty & pitted, frequent adjustment needed but basically bomb proof. I don't think my Bencher paddles would survive long in the wild..... These have.
Vic