the bad thing is with your humidity, you want it consistence. you can't get a tub with a little more height so you can get the lid on? I use mainly 6 qt tubs, but I also have 12 qt tubs incase I get a lot of eggs or like what you have with them being too high for a tub. could your setup work? yes could your setup fail? yes, I don't like taking any chances if I can avoid it.