What's not entirely clear from that article is where the bacterial contamination is coming from in the first place. Different sources could require different solutions.
- if it comes from the food, such as raw meat and unclean vegetables, it can contaminate the rest of the food even before it is eaten.
- if it comes from unclean hands, it can contaminate utensils any time before cooking the next meal.
- same if it comes from unclean surfaces, such as a table. The trickiest transfer might be from the bottom of one plate to the top of another when they are stacked.
I read someplace that it might be safer to clean utensils right before the next use, rather than after the last. I would still want to get rid of old food and grease. But if you really want to careful about bacterial contamination, a chlorine rise right before a meal might be better than one the night before.
We haven't used chlorine, but do tend to use hot or boiling water for a rinse. Also my camping meals tend to be light on raw meats, since they don't store well. And with a small party, cross contamination between people is less of an issue. Still I should be more vigilant about what utensils contact.
paulj