Hello Jill & Ray- There are four types of float trips on the Snake River around Jackson, Scenic, whitewater, combination of the two, and fishing. Scenic floats are dry, leisurely floats that clear your mind and nourish your soul. Whitewater trips are invigorating, cleansing and renewing. Combination trips nourish your soul in the morning and run it thru the washer in the afternoon. Fly fishing in the Western Mountains- well, none better.
In may the weather is up for grabs- we like to say,"If you don't like it wait 15 minutes". Think layers. Light weight long underwear for those cold mornings, basic outerwear(we're very informal here, jeans and a button down shirt is alright in the best eatery), a fleece jacket and a weatherproof shell layer and a pair of shorts and a T-shirt for those perfect afternoons will cover it. Stuff it all in a daypack and add- remove as needed.
Hope this helps. "Meet me at the Wort."