A lot of options to choose from of course. To me personally, I would suggest going the commuting option and establishing ourselves in a different area than our area of operations.
While we didn’t get much warning, that was to be expected, we didn’t prepare for the fact that the pirates would betray our location and that the Hegemony would get ships there this fast.
If we establish ourselves in the Ibroan system we remove ourselves once again from our main area of operations which is a good thing. If we stay in Drenan after an attack, they will probably highten patrols and find us faster.
Of course the mobile base is also an option to take into consideration, like Lt. Yooey described.