I live in a pretty small place in the golden horseshoe, but 20 minutes away from 2 big cities. There are no shortage of daycamps for this age group in my town so I can't imagine there being in larger places either with more resources. Just the YMCA along with the town, there is always something available. I am notoriously last minute registering too and I've never struggled to find openings. It's hard for any family with kids who have allergies, but I can't imagine them being at any greater risk in a day camp than with a home daycare provider. Probably quite the opposite considering ministry governed operators have to adhere to strict guidelines and protocol for this exact kind of situation and they are far more used to dealing with these types of things than a home daycare provider.