That's the MOSFET shunt regulator that is the gold standard. Tighter voltage regulation, better voltage set point for AGM and LiFePO4 batteries, no capacity loss and a little more reliable, though the stock K7X regulator has no reliability issues.
It will only get stator temps down a little bit and is not the solution for that problem.
Neither is the series regulator unless you regularly use less then 312 watts and can deal with reducing your maximum output down to 352 watts.
You don't need a special charger for LiFePO4 batteries, you just need to be sure not to charge them beyond 14.7 volts.
With a manual charger, sit with it and manually stop charging when you hit 14.7 volts.
Most automatic chargers work fine but if it's got an automatically engaged desulfate mode, don't use it or watch it and manually terminate charge when 14.7 volts is reached.
I would absolutely bring a multimeter as for batteries or the bike it is the #1 most useful tool.
If I were going seriously far from the power grid, I would bring small solar charger. I wouldn't bother with a purpose built lithium charger except for long term storage.