I personally would be scared some of the RCS would eat the tiny fry. I just use one adult mystery snail. I have a spawn log going in the spawn section.
As for my drip system.. it's hard to describe.. I have shelves and I use anywhere from glass gallon jars to water gallon jugs lol. Not using it now, but can set one up and take a picture to show.
But GhostFeather has you covered.. if you don't want to drill a hole into the bucket you don't have to.. as long as it's higher than the tank it will be fine.. gravity will make it work. You just have to make sure the airline tubing is secure to the bucket - duct tape, clothes pin, etc.
I purchased my control valve here
.. I got lazy.. but I took off the hard plastic hook section and just used regular airline tubing to run from the (inside) bottom of the jugs to the control valve.. and then just used the tubing that came with it from the control valve to the tank itself. You will have to use your mouth or a turkey baster to get the suction going though.. I take off the tubing from the water container to the valve.. suck until the water starts then quickly stick the tube back on the valve.. expect some splashes lol