Raft = shorts & T-shirt with layers and rain gear handy.
Ducky = Splash wear with layers, NRS Hydroskin, or shorty wetsuit, especially if you tend to be cold or anticipate a lot of "out of ducky" experiences.
Camp = Mostly warm weather stuff, swimsuits, but have some layering pieces, and good rain gear. July is usually pleasantly hot to blazing hot, but you never know. One year we had a rainy & cool August trip. Make sure your group has a good shade & rain tarp, big enough for the group to hang out under. Many of the camps, especially river right, have no shade.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb