It is not advised. The wedding will be held outside and much of the festivities are on grass. No shoes is preferred.
Attire is semi-formal. It's a backyard wedding. Ben and I, however, certainly don't judge so long as your man or lady parts are covered, you do you!
Yes, you will not go hungry.
Yes, after the ceremony is over the pool is open.
See for yourself: https://www.cascadecrescendo.com/. Cascade Crescendo is considered jamgrass which is a modern form of bluegrass. Their songs are generally upbeat and fast-paced - be ready to dance!