Help please! I am participating in an outdoor festival early July. I sell chocolates and baked goods. Up to now, I have only done indoor craft fairs, etc. and have been using coolers to keep my chocolates and stuff cold. I will do the same at the outdoor festival but how can I best optimize use of my coolers? Do I have to have a Cambro or can I "get by" with coolers? What do I do about "extra" inventory that I want to keep especially fresh for purchases late in the day? Should I offer to keep purchased items cool at my booth while people do their additional shopping? Any tips would be appreciated. Thanks!