I believe Strates got the German funhouse in 1981 from Conklin.
Also in this thread, did Kevin Exum have the Ghost Train out west at one time?
The two trailer walk-thru Haunted House was Jackie Norman's, wasn't it? It showed up around 1977. It was very effective when they put it on a dark road with some trees around it. I think the guy who built it built two because I saw a similar one on Reithoffer's in the mid 80's. One of then was built using 2 beer trailers. You could see where "Budweiser" had been removed from the back side of the trailers.