It depends a lot on the age of your tort and your temps. High humidity and hydration will help to raise a smooth healthy hatchling, but if yours is already older, its not as important. And as Mike noted above, warn temps are a necessity if you are going to keep it humid.
But I'd be a little concerned about my temps being around 80...I'd like that to be on the low end...I prefer the high end to b around 110...and at least 75% humidity.