I do not grow Camellia's either Fiat, but from my experience in growing container plants here in our thermal heat area, our soil in the containers does not go soggy a lot, since our temps are too hot and humidity extremely low. Provided too that you have added perlite so the soil does not compact too much, then your plants roots will be okay. It will be soggy if there is no drainage in the container, then you will have a problem with the roots. But if it has drainage plus our extreme heat, oftentimes our containers have thirsty plants. More so when temps are hitting 90F and higher. Another factor will be the type of container, if it is unglazed pot, then evaporation is faster since pots itself will draw water away. Glazed pots inside and outside may make the water stay just a bit longer too, so oftentimes, some people would add a couple more holes at the bottom.
The plants and trees also do their heat adapatation where when it is just extremely hot, you will notice after a day or two, it will start dropping leaves. It will try to keep only the amount of leaves it can sustain with the heat and moisture it gets. Making them stay too dry is bad of course, especially your camellia, it is not a succulent. Always aim for middle ground. If you are unsure if your soil is wet, you can also do the skewer method we use with orchids, dip the skewer in the soil, if it comes out wet, then soil is still damp. Or put a big rock in the container, if you lift it and see the soil below is damp, then your soil is still moist.
