Wendyhill:
I have successfully used the low sweat Melt and Pour base from Bramble Berry in my humid areas. My soaps turned out really well. My next try will be to incorporate some regular other bases into this to see if the "dew" forms afterwards. Wrapping right away always works for me and you can still smell the great fragrances through the wrapping.
In order to make a more rustic looking soap, try some rebatching from Bramble Berry. They have some nice recipes and this base is shredded processed soap that does not have as much glycerin in it so the "dew" seems like it wouldn't be a problem
Best of luck!