Asteroids make great refueling stops. I'm finding that most roids have Casilon as well

I have the same thing going on....captured the base years ago and the boss pirate is still in hiding.....don't really want to blow up the base as I like where it is...been sending Spies out after him, but so far no joy
I've had a shaded Frigate that is probably him trying to raid some fuel but my ...

Figured out a work around for the fueling issue...just tried it out an hour ago and it worked like a charm...
Find out what route your fleet is going to take and pre-position a "Supply Flotilla" at the last stop and re-fuel there before you go in, once you have the upper hand, bring in the Supply ...