This topic would fall under the "business" heading which makes it an ok topic to broach with her.
Have you asked her directly if she will be going or not?
If she says yes, then you make plans to conduct the trip giving everyone the space they will need.
If she says no, then it's only right that the boys be told that SHE has decided not to go. And your job is to affirm to them that you can still go on the trip and have a great time.
Simple.
Direct.
No need to make more of it than it is.
Blessings,
Bill
"Don't tell me the sky is the limit when there are footprints on the moon."
