I don't think that clanners will have much problems to hunt at lush fields and 20k when guards starts to KoS again.

Lush fields: Harry's is a neutral place. So, nothing will prevent clanners to grid to harry's and go hunt in lush, they just need not to go near of the central omni outpost, or lush ressort to the south. And I think they save in harry's currently when they hunt at lush, so it won't really change anything for them (except that at lower levels, they won't be able to go in front of OP gates to find a team, after when they hunt at NW cave, it doesn't matter since teams forms near the cave)

And 20k... Just grid to omni trade, which is 100%, and whompa from there, if you don't want to go by grid.