Reddit mentions of The Solo Wargaming Guide

https://www.amazon.com/Solo-Wargaming-Guide-William-Silvester/dp/1938270134

This book has helped me a lot. It's a nice little tool box of rules and ideas for playing solo. However, you may want to restrict yourself to around 1000 points. Anything above that gets kinda messy.

I've been using the following two books for my (mostly solo) wargaming campaign:

• The Solo Wargaming Guide by William Silvester
  
  
• Setting Up a Wargames Campaign by Tony Bath (out of print)
  
  For me, map turns and battle turns are separate. I measure by a week's time at the map level. I assume that a battle or series of battles takes place within that week.
  
  If multiple forces are converging on a single point at the map/strategic level, then I'll take that into account for the scenario at the battle/tactical level.
  
  If you do find/use a simple logistics approach, I'd love to hear it! Most seem to be complex.