Casual dress, business casual, or formal will be fine.
White, obviously, regency purple, and royal blue. Those are the bridesmaids colors. As long as you aren’t in those solid colors, you can wear those colors.
We have cabins on-site that we are filling with the wedding party and out of town family first. Contact us to find out availability. We will also set aside a block of rooms at a nearby hotel once we know how many rooms will be needed.
No. It is guest preference as to whether you wear a mask or not.