At least 15 minutes early.
Not specifically, but we would appreciate a semi-formal look.
No, it is a very short walk on a sidewalk with easy access(about 75 ft).
No, there will not be a reception. Only a ceremony. However, we do plan to have a get together some time when we get back home and would love to have you there!
No, this is in a national park and they have a strict “Leave No Trace” policy. Which consists of nothing left on the ground that wasn’t there before. This also includes in Tobacco products.