below is a list of etiquette taken from Southern Native American Pow Wows It deals with the Southern style of powwow but is applicable to all powwows.

1. Bring your own seating when attending pow wows, because public seating is the exception rather than the rule. Lawn chairs are the most common way of solving this.

2. Do not sit on the benches around the arena. These benches are reserved for the dancers only. You may set up your chairs directly behind the benches, and it is usually good courtesy to ask the permission of the dancer whose bench you are sitting behind, as he/she might have family who are going to sit by him or her.
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3. Ask permission before taking pictures of dancers. Many people are sensitive about pictures, so it is always good to be on the safe side and ask.

4. Donate money to the Drum.This is done during a blanket dance, when a blanket will be laid out on the ground and a song or songs will be sung. It is customary to place a dollar bill (or more if you wish) on the blanket and dance the rest of that song, regardless of if you are dressed or not. If you don’t want to dance, you should ask a dancer to place the money on the drum for you. The drum has probably traveled a great distance to give you the beautiful songs you hear, and counts on this to help pay their expenses.

5. Always stand during special songs. This includes Grand Entry, Flag Songs, Veteran Songs, Memorial Songs, Prayer Songs, or any other song that the M.C. designates. It is also customary to remove any hats that you have on for the duration of that song.

6. Always listen to the M.C. He will give all of the information you need, as well as entertain you and keep you posted on news. Any questions you have can be answered by him.

7. Remember you are a guest. Have fun, ask questions and meet people. Everyone there is welcome!

For a list of terminology visit here