I was asked a while ago if there was a way to automate updating a spreadsheet and placing it on the cache page, but I could not think anything up that was worth anything.
I think the best bet if the owner wants to update it on a regular basis is to make a spreadsheet and save that as an html table and paste that into the cache page.
I usually won't trouble myself to go to an extra web page. In fact, since often I don't know if I am attending, I don't specify what I am bringing! And no one has ever brought anything to a pot luck that was close to what I brought. At least not yet.