We always stay in GS. We always buy the drink package. Only complimentary drinks in SL/CK are from the Diamond List. Only Beer/Wine outside of happy hour unless you have the drink package. If you like Vodka, the house Vodka is New Amsterdam. Most people think it’s just bad. It you want a quality Vodka/Scotch/Bourbon, get the package.
Make sure you reply to the Concierge letter with you preferred dinner dinning time for CK, if you plan to eat there Otherwise, it’s possible the times you want may be taken when you board. That letter typically comes 3-5 days before your cruise departs.