Pretty much every camp has a hike:
Put-in - hike up to the Gates
Wade & Curtis - head downstream to Winnie's Grotto
Pot Creek - head up the side canyon, no real destination
Kolb - no hike
Rippling Brook - way cool trickle of a waterfall and the view that's on one of the posters
Wild Mountain - overview of canyon
Limestone - GREAT overview of canyon then can continue on to springs
Confluence - the Outlaw Trail (where the Wild Bunch rode) to an overlook of Echo Park
Echo Park - up the road to Whispering Cave and further to a really cool petro panel
State Line - no hike
Jones Hole - Ely Creek (i.e. Butt Dam) and petros, continue past the falls for some cool slick rock canyons
Comp - no hike
Rainbow Park - petros (hard to find if you don't know where they are)
Take out - hike back up the anticline.
That buffalo is river left at the end of some juniper trees just before where a big section of cliff landed in the river. I wouldn't advise stopping - lots of poisen ivy there.
Have a great trip, my wife's camped at Comp tonight. Work sucks.