I'm thinking of selling some of my m&p soaps at a local craft fair in July when it will be very hot and humid here in the south. Will my soaps survive in those conditions or will they melt or anything?
The heat is just an awful idea for M&P. They are going to collect moisture and you will have to repackage everything, if you are able to salvage it. I'd say it's a no go. I did it once and only once. And I'm in MI - hot heat, but not as bad as some places.
I sell HP at summer events and have very minimal meltage with that, but I know tha MP can be problamatic. I would pack a cooler full of ice pacs. Put them under your tablecloth to elevate the soaps and keep them cool, changing out periotically. You might also want to get a picnic umbrella to keep them under shade or get a spot near a tree because it is always cooler under trees. What part of the south? I am speaking from my experiences in North Carolina.