They're a bit pricey, but I like the square farmer trays with built in risers-but any of the tray/riser combos people have shown here will work. To get out the liquid, you have a few options. A wet/dry vac is a bit much for a single tent grow, but there are battery powered liquid transfer pumps on amazon that are meant for gasoline that work well. The battery operated ones go through a lot of batteries though, and tend to break easily, so my favorite option is a manual liquid transfer pump-get the kind with the pump handle and not the squeeze bulb, they run about $11.