Don't stress about raising your ISO. Better noisy than blurred movement.
Be brutal with your final selection. 5 killer shots is better than 5 killer shots and 15 'meh' shots.
I can probably count on one hand the amount of times I've genuinely thought 'I wish I was at home with a takeaway watching the telly'.
I don't rely on the cash. It's handy, but I'd genuinely do it just for the crack.
A palm-muted P with flats will sound great.
Anything other than an upright is basically sacrilege, so there's no point bothering with an acoustic bass 'cos it won't get you any additional credibility points and won't give you any tonal advantage.