I'm not an expert on the area, but basically the main trail heads out along the river, and any side trips go uphill and into the Seven Devils. Try checking into the Snake River National Rec Trail... it goes up along the river, really cool. Not a lot of mileage, but some tremendous historical places to visit and explore. Its way low in altitude, and usually very mild, even in Nov.
Would be an awesome low key hike with great attractions. I spent the day at the Kirkwood Ranch, there is a museum there and tons of amazing stuff. Have fun!