Go early as the best rhizomes go very fast. You can expect friendly people who really want you to come in and buy some irises. You can expect people who will answer your iris questions. You can expect many different types of irises. You will be invited to join. I recommend that if you do not join at the sale that you visit a meeting and then join. The irises will be sorted and placed on the tables in groups. Some clubs place them by color. Some place them by date. There should always be a photo of the iris by the rhizomes. They should also be sorted by whether they are a TB, BB, IB, etc. If they are not sorted by the latter they will be marked TB, BB, IB, etc and it will be up to you to make your choices. You will be offered a sack or bag to put your choices in and then you will take them to a table where they will be counted and you will pay. You always gat a bargain and beauties. The clubs depend on the funds raised to pay the rents where they hold meetings etc but they also want to encourage new members and the general public to buy/plant/grow irises so they are priced to sell. Once you have made the first round go back and slowly make the rounds again just to enjoy the sale, the people and the iris talk. have fun.