Unfortunately moving the tank is not an option as I live in a basement suite with a very unusual configuration and there are no other suitable place to put it. I don't really feel like getting rid of my males either. I actually lucked out and found an electronic timer at the thrift store near my work for $2 so I figured I'd get it and give it a shot. At the very least it'll turn the light on before I even get up to go to work, which I think will give them a more natural daytime light period.

As far as water level goes... I actually just finished reconfiguring my tank to have MORE water. :P Before it was a fairly large landmass and a fairly deep but small area of water, perhaps 2/3 land/water ratio. I just changed it to the left side and rear have land and the front portion is open leading to a "shore" area to the right and up to the land at the back. I definitely miss all the green from before, but I think the toads will be much happier with this set up.

They were more or less silent last night, we'll see if this keeps up! Thanks for the input!