yeah, i do intend to expand my routine with a regular high intensity squat with a big weight on me, once i top out at 30kg loads - mainly because when i hit 30kg i only need to do that once a week for my shopping requirements.
by the way, that reminds me, you are probably aware of this but Systema martial art training routines include extremely high intensity, extra weight stuff, like doing push-ups with someone on your back. this is part of the reason why rucking appeals to me, it's building a baseline for me to be able to take on more mountain climbing.
madeira has some amazing places to be seen, most of them are over 1km altitude and about 15km as the crow flies, so to get there with my own energy is one major goal for me. if shtf i'll be leaving it in my dust, and nobody used to normal terrain will have a chance of getting to me.