Been focus stacking landscapes for some time now, using cameras that have in-camera capabilities (Fuji X-T2, where its called Focus Bracketing) and with other cameras that do not, but instead require manual (and/or AF spot) focusing techniques. While there might be some potential usefulness in starting the first --or closermost-- of your stack hyperfocally, I think over time you'd find --as I have- that focusing more precisely on the more crucial (as in 'must be spot on in focus') particular planes of near/far distances will net you more usable results. In the field, things move, and they move both rapidly and unexpectedly; speed becomes key between exposures, and pre-selecting your specific focus points and being able to access and expose for them quickly and surely is of absolute necessity. Learning how to assess and deal with field conditions, too, is important; having experience with that will inform you whether two exposures will be all that's allowed, or whether six or eight (or whatever) will be possible.