Glad you made it through bruh. You definitely have to adjust in many different situations as a musician.
God knows I do every Sunday.1st and 4th Sundays I play organ with a guitar and drum player. 2nd on the organ with a drummer, 5th on organ with drummer and keyboardist, and 3rd on keyboard with a drummer.
As you see, I don't have a bass player but even if he play the basic notes I promise you, I make him/her and the rest of the band sound good cause you have to adopt and most of the time QUICKLY! I played with one 2 nights at the conference last week and man did it make my life easier but without him, I am still good cause I know my basslines for every song and that's what you and others here may need to do. Just because you have a bass player you still need to learn those basslines in case they don't show up. For me, if they show up...great! If not, I am still good. Bad drummer, whatever, still can wotk it.