After my previous response, it has been brought to my attention that this might be 1998 as opposed to 1988 that I stated earlier.
I have taken a closer look at the pictures, and i tend to agree. Christoph H (middle of lower picture) is too "old" in this picture to be in '88. Likewise, Angelika is also to "old" in this picture to be '88. The cars in the background are also to nice looking to be '88.
Wheras the site was very nice in '88, the transportation then wasn't. By '98, the site had deteriorated noticable due to lack of maintenance, but the transportation was newer.
So, I agree that this was in '98 as opposed to '88.
Paul Walker