Another vote for aeropress here, I was introduced to one on my last bikepacking venture and now have one at home and one in the office,
as mentioned above, I like my coffee black and sugarless so all is needed is ground coffee, hot water and the aeropress but single serve sugar and milk sachets aren’t massive space consumers that will fit snugly within the aeropress plunger
My own personal preference would be with the “regular” aeropress rather than the “go” for two reasons
1. The regular is SLIGHTLY larger but not so much that it really impedes any backpack space, this helps if there’s more than one person also as more brewing capacity
2. The aeropress go cup (as far as I know) is square and I personally find square cups a faff to drink from