You are describing how it works if you already have everything established ahead of going to the park.
I already went to the park...liked the photos...and took the cards with me so that I could download them after I buy a pass at home. I did that and it is very unclear how to make it work. There is a remarkable lack of support.
I thought that I got everything working, but when I typed in the code on each card on the FunPix website, it said that there was an error.