Yes, and welcomed! We want this to be a fun, family affair for all ages to mingle. If you need a break from watching your little ones at any point, rest assured that you'll find an auntie, cousin, or grandma that will be thrilled to 'take over' for a short bit.
Semi-formal/casual. We want you to feel comfortable. Generally, folks don't 'dress up' quite as formally in the UP for weddings. However you come, we will be happy to see you!
We are not planning an organized even for Monday the 4th, as most will have to leave early to travel back home.
If you are an unmarried adult and your invite was addressed just to you, than you can assume that bringing a date is allowed. If you have not yet confirmed that you a bringing someone with you (as most of you already have), please let us know ASAP.