I live about 35-40 miles from there and used to ride there  occasionally, but just went for the day. When I used to go, they charged $15 for the day when you brought your own horse and you have to show your coggins test. My late sister and I used to go there and ride for 4 or more hours and still never covered all the trails and we felt like we got our monies worth of riding for $15.. The maps are a little confusing but without it you can get lost. I do know they have changed some of the trails over the years cuz some of the trails went through some of the property owners land and the owners didn't like it. I really liked riding there but cuz of family and lack of funds (laid off from job off and on over the last two years) just have never made it back up there. If you come up this way you can also go to Lake-Le-Aqua-Na State Park in Lena,IL. Very nice place to camp and ride. I think it is about 35 miles (or maybe less) from Shenandoah. Worth checking out. These two and Rockwood State Park (a little more challenging to ride than the other two, but still nice riding) in Morrison, IL are all in the range of 35 miles or less from me. The trails at both the state parks are well taken care of and they close them if they get over half an inch of rain.