Very quick couple questions:
1.- Is there a maximum crew members you can hire along the game? Assuming not, just being limited by the total amount of crew cards coming along with the game, right?
2.- Is there a maximum crew members you can exhaust? I mean, my assumption is that I should be keeping at least ONE crew member "on deck" otherwise who will be piloting the ship? I can't send 100% of my crew to the hammocks, I believe.
You can hire any number of crew with no limits. Of course, once the pile runs out, there are new more crews left to buy.
You can exhaust all of your crew and the ship will pilot itself lol -- It may not "make sense", but there is no rule that requires you to have someone pilot the ship. You can exhaust/injure ALL of your crew at the same time.