One extra thing to consider is whether or not you want someone to be the nominated Captain. Whilst it may feel "unfair" it has the advantage of spurring some interesting character interactions and allows for a quick way to prevent split party decisions from bogging down the game.
I'll just give you a little more information about Blackjacks so you know what your signing up to before you commit to it. They are basically Independent terrorists who resort to guerrillas tactics. This includes hi-jacking space craft, loading them with explosives and setting them adrift on a collision coarse with a target. Although they do not specifically target civilians, they are often acceptable collateral damage. They take part in covert missions and objectives, sabotaging Alliance terraforming operations or military facilities. I imagine this was the "underground organisation" that Simon paid to rescue River. Most members live a double life so as to remain undetected; often working as sleeper agents for many years within the Alliance government, using the information they gather to bring the machine down from the inside.