Although Astrobeck uses Harmon DP paper may I suggest an alternative to DP or to regular B&W negative film. Use regular photo paper for the negative. Cut up regular RC paper to 35mm wide and 60mm long. Load under safelight by laying the strip on the film rails and carefully closing the back. Obviously single shot and the nominal ISO of 6 to 12 can still be exposed in good light handheld with a fast lens. The advantage is very quick feed back and loading and processing can be carried out under safelight. When dry just contact print, emulsion to emulsion on whatever photo paper you desire. Another advantage over film is not having to finish a whole roll to see results. A disadvantage is of course the necessary to return to your darkroom to load another shot. Single shot per outing. The other advantage to to the positive/negative setup is the print is not mirror image like with DP paper. It takes a little longer and you have to use two pieces of paper but you have more control of exposure results.
Just a few musings on the thread. Also sounds like a good winter project.
The paper based negative/positive should also work with some 6X6 and 6X9 cameras if you want a bigger print. The darkroom setup is dead simple, 3 small trays, tongs, some print hanging clips, safelight. Setup in any bathroom you can blackout. You will need a cutter than can produce accurate sizes from 8X10 paper and that can be quite expensive, but a metal straight edge and razor knife can also be used if careful.
