I’m currently in four projects which has become too many. The band I’m intending to leave after over ten years has gigs in July and October, which I plan to play since I committed to them.
In this position, would you inform the group now that you’re planning to leave in October? This would give them lead time to find a new bassist but it could be a bit awkward. Or would you make a clean break after the gigs? They won’t be scheduling gigs after October since the guitarist snowbirds until spring.
I’m on good terms with the members. They won’t be happy but it’s a very good band that I think would attract interest from good bassists. I’m leaning toward the first option but might be missing something.
Thoughts appreciated, especially from folks who have dealt with this in the past.
As many others have said: if you're certain, then tell them NOW.
It's an advantage that you're juggling multiple projects. It gives you a good context for leaving with minimal drama, assuming your bandmates already know that you're such a busy bassist.
A cautious approach would be something like "Hey all, I've become way too busy with "real life" as well my hobby, so I need to cut back on my hobby. It's been great working with you all, but I am sad to say that I no longer have the time to give this band the attention you deserve. I'm telling you now so you have plenty of time to find a replacement, and I'll help you get the replacement up to speed if necessary. I'll play your currently booked gigs if you still happen to need me, but won't be available for rehearsals or new gigs. You're a talented band with gigs on the calendar, so I'm sure you'll find a good replacement soon".
If they push back about your other projects, maybe say that you have to make some tough decisions with them as well. You don't need to go into any detail, that's your business.
I also juggle multiple projects -- and so do nearly all of my bandmates in those projects. Each BL has his A team, and usually alternates/subs for when A team members are unavailable. In these cases it's easy to bow out of a project: you just make yourself unavailable, politely declining gigs, and eventually the BL will stop asking, with no hard feelings (note: these bands rarely rehearse; new songs are learned via homework). But that's for future reference. You've made it clear that your band is not like this, which is why I offered the polite approach.