Pay particular attention to the seam between uppers and sole. If you prefer sneakers at camp, you'll need rubber boots. I am not a fan of these because they don't provide enough ankle and foot support for walking and they aren't warm enough for walking in the cold. Young members look to you as an example. If you let wet weather get you down, you pass along the message.
Rain is part of the outdoors.
Glory in it. Take everyone dancing in the rain or puddle jumping. Talk with your members before you go camping, not on the first night of camp when it's pouring. Ask them to tell you all the things they don't like about being outdoors in the rain and list the replies on a chalkboard or flip chart. You may need to prompt them a little, since they are doing this when they are warm and comfortable indoors.