Hi Erin!
How nice that you are coming over next month.
For bigger events, you can find the
following agenda, but it would be preferable to check out the city council's websites, depending on where you are going. Is there a region in particular that you will be visiting? I also found some info and an extended calendar on
this bluegrass dedicated websiteOther than that, local
music pubs and venues have concert calendars and weekly/nightly traditional music sessions (even if it isn't exactly Bluegrass, it's a really great and casual experience)
Talk soon,
Antoine