Anybody been to Khao Yai about 3 hours drive away from Bangkok? Nice place to bring your children ? Any nice accommodation to recommend there and activities to do n place to visit there?

I used to work for Hippoontour.com or meta-search website Hippobooking.com and once customized private itinerary for family couple to Khao Yai. Put them up @ The Greenery Resort and arranged short trips to Palio (the Italy of Thailand), Bonanza Exotic Zoo, PB Valley Winery, GranMonte Vineyard, Pete Maze, Farm Chokchai.