That's a great email, Sarita, thank you!! I'm kind of stressed out about it for some reason so my drafts sounded stressed too. This is definitely more the right tone.
Mozar, yeah, was trying to keep it simple and might have been confusing. The second job takes place over like 7 days, while the first job is 2 16-hour days, both of which overlap. And they're both for live events and I'm just crew, so there's no schedule accommodation possible.
The second job, the 7-day one, is with a group I have a long relationship with and I'm already booked with them for four other jobs this year. So there's no danger in turning them down. The first group, well, they're a touring group so they all work together a lot. They only kept me when the event changed hands from the year before because one of the artist's managers really liked me and insisted. They did offer to put me on the call list for touring work, but I have a full-time job. So, they like me, but since they normally work as a group and I was an exception last year, I suspect skipping a year would be the end of it. Plus, I wouldn't mind keeping up the touring work connection if something ever happened to my full-time job.