Re: Drag Bag Question
550 cord will work and its cheap and available. Double strand with knots tied every fer inches. The knots do two things. One, they make it easy to retrieve your bag, and two, they allow the user to adjust the length of the bad behind you.
When crawling I prefer to have the bag about ankle level or a bit higher. This allows you to move the back with your feet, keeping it free of snags and causing unnecessary overhead movement.
When using a hands and knee crawl I like it just below the knees and mid calf. TO do this you need to chance the length of cord from the crawling length to a bit shorter.
I snap a D ring to the metal loop on a riggers belt.