Hexcrawling, that style of RPG play in which the players trek overland for many miles, is a tradition going back to the earliest days of the hobby. However, when I read the rules governing wilderness adventures in Cook's 1981 Expert ruleset, I could figure out how this actually was supposed to work at the game table.
Dan Proctor's Labyrinth Lord retro-clone of these B/X rules does a better job of presenting the material, but still fails to deliver a set of concise instructions on how a DM would run this type of adventure.
I have taken a stab at this.
This document outlines how to setup and run a hexcrawl using the standard LL rules. I approached the organization of this document as if I were writing rules for a board game to reduce ambiguity.
Right now, this document is in a "public beta" phase, where you can make comments directly on the document about anything you'd like. In a few days, I will close the beta and publish a free PDF of this content on RPGNow. All of the content therein is OGL and will always be free.
Go get your trek on.