Anyone. Any age is invited.
If you do give a monetary or a physical gift, you must register it with the person documenting what the gift is and whom it came from. It is mandatory in Hmong weddings that all gifts for the newlyweds be recorded. Please ask for the gift recorder upon arrival.
The simple answer is, whenever you want. This is a very casual suburban home party. Lunchtime is a great time for food lovers. However, the busiest time will be towards the end of the wedding sometime between 1-3 PM. Come and go as you please!
Anything you want. Be fancy, casual, or even show up in PJs. It's a casual cultural hangout.
It will all be residential street parking.