After I got done looking at all of the extra stuff I'd have to buy to treat sheet film the way I've always treated roll film, I let it go and went to using trays last night. The first four shots I took with my Graflex Crown Graphic were lovingly bathed by hand in trays in my bathtub while I sat on the floor. I used the DigitalTruth Massive Dev Chart app on my iPhone as a timer (just need to find a better way to contain the ambient light from the screen while still seeing the timer).
I need to refine the process a little bit but the negatives look good.
Next up? Finding a portable enlarger & learning to print!