Trays have worked well for me. When I do it, I just sit in the dark. Some music helps pass the time. The developer I use is either D-23 1:7 or Rodinal 1:100. The Rodinal gives a higher film speed, but the D-23 kills the contrast a lot more than the Rodinal. I overexpose by two stops from my decided-upon exposure when using the D-23. I use enough developer to cover the film twice as much as normal, since the corners coming out of the solution is my biggest fear. A slosher is the way to go. It takes up a ton of time doing a sheet at a time, and the time I experimented with multiple sheets in the same tray, most of the negs were ruined. I have considered using double-sided tape to hold the film down to the bottom of the tray, so I can use less developer.