Jerome Delaunay's Scow 244

 Not exactly an Oar Cruiser. It's a Sail/Oar Cruiser... emphasis on SAIL. It's 8' (2.44 m) long with a hull design very similar to the PDR, of which there are many variations. There is room to sleep aboard and carry supplies/equipment for a multi-day single-handed cruise. 

Modifications:

• Added oar locks to the forward end of the cockpit and included 8' (2.44 m) oars which need to be that long in order to work with the height of the locks above the water. The rower would stand, facing forward and push the oars to row. See Rowing Geometry for how to calculate that 8' (2.44 m) oars will work with a span of 3' 6" (1067 mm) and locks 2' 3" (686 mm) above the waterline.
  
  
• Added a large hatch over the compartment forward of the mast. This compartment could be used for storage of the anchor and other wet/muddy items.
  
  
• Rather than a solid bulkhead aft (supporting the forward edge of the rear deck), I opened up the bulkhead to provide more sleeping space resulting in a sleeping platform 6' 10" (2083 mm) long. 
  
  
• If I were to build it full size, I'd increase the width of the side compartments from 6" (152 mm) to 9" (229 mm) to provide more storage capacity and only narrow the sleeping area by 6" (152 mm) (to 30" (762 mm)).
  
  
• I'd make a drop-in framed bug screen that would fill the top of the rear bulkhead and to which the rear edge of the 'canvas' cover would be attached.
  
  
• I'd add a simple removable thwart that spanned the storage compartments that could be used while sailing.
  
  

Compartments on both sides, from bulkhead to bulkhead, provide storage. 

The cockpit opening is covered with 'canvas' to provide a rain-proof night time.
The horizontal handle on the pivoting leeboard should be pointing aft, not forward.

The cockpit opening is 45" (1143 mm) long by
36" (914 mm) wide while the sleeping platform
is 6' 10" (2083 mm) long and 36" (914 mm) wide.

The 'junk sail' is 65 sq. ft. (6.04 sq. m)

Oars to be stored on side decks when sailing.

Specifications:

LOA: 8' (2.4 m)

Beam: 4' 1/2" (1232 mm)

Weight: 150 lbs (68 kg)

Displacement loaded: 630 lbs (286 kg)

WLL: 7' 3" (2210 mm)

WLW: 4' 0" (1232 mm)

WLL/WLW ratio: 1.8:1

Hull speed: 3.6 knots, 6.7 kph, 4.0 mph

Plans:

The free plans for the Scow 244 are available from Duckworks.

Summary-Pros:

• Very complete plans leading to a straight-forward build
• It has 26" (660 mm) headroom under the 'cuddy'
• Storage space for supplies
• Comfortable sleeping area 
• Oar propulsion for maneuvering in tight spaces 
• The PDR style hull has proven to be reasonably sea-worthy; A number of PDRs have sailed the Texas 200

Summary-Cons:

• Short WLL will result in a slow boat
• As with any boat this small, headroom is an issue