I volunteer at the local CP, and they are very stringent about cleanliness and cross-infection. Each "block" of pens is color-coded, with it's own cleaning equipment (buckets, mops, etc), and all beds, bedding, and litter boxes are color-coded as well. We use alcohol gel on our hands between cats too. I was amazed at how clean and hygenic they keep it, and really impressed at their concern about cat health.
Sounds like it was a good trip for you; I love those cat-shaped cookies! Would love to find cat-shaped cookie cutters...