OK, haven't got to fields yet but as I said, "no more" than 3/4 sector apart. Some will definitely be closer.
As far as hill and valleys yes I will, I have to pay around with the filters and see how that works. I'm thinking some nice canyon's up in the mountains.
This is what I'm thinking regarding base placement:
Each continent divided into 2 zones, Small airfields and v-bases fairly close together on the perimeters of the zones, then inside that medium airfields & v-bases slightly further apart and then inside large airfields & v-bases even further apart. Again, not more than 2/3 sector.
As far as # of bases I'll have to see how the spacing works out.