Has anyone here ever been to the House on the Rock in Spring Green, Wisconsin?

I’m planning on taking a friend of mine up to Wisconsin to see the House on the Rock either in May or August. We’ve both wanted to go for a long time, and figured why the hell not. I wanted to ask here and see if any Flutherites have been there before and if there is anything I should know about the attraction or anything else in Southern Wisconsin I should plan to see (bars, freak shows, weird stuff, historical sites, whatever) Also, any Jellies between Tennessee and Wisconsin should chime in, in case we should meet up