For those who are still interested, I leave today for Buenos Aires!
Final kit is K-1 Mark II and KP (with battery grip), plus chargers and spare batteries.
DA10-17, DFA15-30, DFA28-105, DA*55, DFA150-450 and also DA15, 21, 35 and 70 Limiteds for urban walk arounds.
Lee 150 filters (Grad ND and Big Stopper) for the DFA15-30, two 49mm filters (C-PL and 10 stop ND) for the DA Limiteds, and 62mm and 86mm polarisers for the other zooms.
PD Everyday Backpack, Tamrac VeloCity 5x, Sirui tripod. 12" Laptop for storage and PP.
It all fits, and is within weight restrictions. There's even room for clothes and travel sickness medications
Thanks to all for suggestions, guidance and indulgence. Photos to follow.