I see. Most engineers will record a direct signal from the bass with a direct box and they might also mic the bass amp. You should ask the engineer which amp/cab you should bring. The studio might have a great amp for recording. He might not want to use an amp at all, thats ok too.
If you're gonna be listening through headphones, that can be kind of weird at first. Every so often, make sure you're not playing harder or softer than you normally do. If you don't hear yourself well in the phones, you might play harder than normal and your technique will go south and you'll go sloppy. This can happen without you realizing it, it happens to me a lot.
Tune often.
don't drink.
Play simple but tight.
Bring your A game.
have fun.
If you can, get your bass set up before you go into the studio. If your intonation is out, tuning issues will drive you and your bandmates crazy.
