All my hives have Screened bottom boards which I make myself, they have a deeper than normal lip below them and a slot for the tray to slide in, the slot is cut at about a 12 degree forward angle so when the tray is in, it is about 3/8" lower in the front. when the tray is in this allows moisture that falls to pass through the screen and run out of the bottom board. when the tray is out the moisture would naturally fall to the ground. I normally use lower entrances, but usually have a top entrance also. Helps with ventilation, and allows foragers easy access to super.
It is insignificant but many years ago I have a hive topple over in early autumn because I had it leaned forward a bit too much and had 5 supers on it. So I came up with this configuration, and have used it since.