Yes, I use individual trays...they are around 22"x26" inside dimensions....sounds like the same size Monty is using except mine are the normal depth. (extra-deep would be nice)
I use 4-5 gallons of developer which I save and replenish. I use the fairly common approach of a water pre-soak, then developer, stop, fix, holding bath. I develop emulsion-side-up, and agitate by pulling the bottom neg from the stack and placing it on top and pushing down to re-submerge it. I wear thin nitrile gloves while I do this, and have a long vent at the back of the sink to draw air past me, over the trays and out to the outdoors. A modified household furnace blower is the heart of the ventilation system. Once I have finished or have a batch to fill the washer, I second-fix, use hypo-eliminator and wash them in a 20x24 vertical print washer and hang to dry after using a small hole-punch in one corner for wire hooks on a clothesline over the sink.