I checked a couple of those pay to pan gold mines , but they seem to be closed till about the middle of march . I found a website ,
WWW.IOWAGOLD.COM . This site tells of old gold mines all over the state . Don't know if it will help you any , but it is interesting . I'm going to look into some of these places myself . My daughter told me a while back that she found a place that was open year round within 50 miles of the charlotte area , which is my area . I'll let you know what I find out about that . If you end up coming thru this area , If I can sneak away from work , I'd be glad to try and hook up for some panning or detecting . I'll keep looking and see what I can come up with .