I'd suggest a trip down to Boathouse for lunch in Salida. Laid back atmosphere right on the river, can usually grab a patio seat right over the water if it's not too crowded. Food and beer is decent as well and it's fun to watch the kayakers run the river shoots right under the bridge.
Would also highly suggest doing one of these trips as well.
Ducky Adventures they're just inflatable, single kayaks, but it's a pretty leisurely float that only takes a couple of hours and dumps you right out in downtown Salida. I liked it a lot better than the big group rafting trips.