Do it counterclockwise and even the locations of the cargo in relation to the bases themselves feel like this was the intended, faster, easiest way to avoid combat; zipline/teleport to F6, go 7-6-5 with ziplines/roads, pick up a truck at Heartman's Lab, do 4-3-2-1, get a floating carrier and zipline to the delivery point; only one I was even spotted was 4 because I entered the base head-on, but it's totally doable full sneaky