A nice cup of rabies

Not sure how soon you need this, but here's a lead on a photographer who photographed things at that park in that era:

http://www.pontchartrainbeach.com/pbzrc8.jpg&imgrefurl=http://www.pontchartrainbeach.com/&usg=__tYI0nkhdufAfhKoCd3NJYNFq_-Y=&h=577&w=873&sz=54&hl=en&start=5&um=1&tbnid=FgYWxyTV5hjDDM:&tbnh=96&tbnw=146&prev=/images%3Fq%3D%2522wild%2Bmaus%2522%26um%3D1%26hl%3Den%26safe%3Doff%26sa%3DN

Here's info on the companies who made and imported it. Perhaps they could be contacted for an image.

http://www.personal.psu.edu/faculty/v/a/vac3/wdm.html

Here's an internet discussion group on Ponchartrain Beach amusement park during the period you seek:

http://groups.yahoo.com/group/Pontchartrain-Beach/summary

I'll forward your request to a friend who grew up on NOLA. He may have something....