there is no L6. You probably mean L3 or L4; those are the stable lagrange points that don't require stationkeeping.

i love the idea of a setting dominated by normal-ish rockets and wormholes. i had my own version of this concept a while ago, but it allows for even lower tech because in that setting, wormholes just kind pop up naturally during solar system formation.

xkcd.com/2717/

L6 Lagrange Point

Oops. I meant L3.