Have you ever noticed the outdoor movement rate seems brutally slow. Each square equals 100 yards. One square/hour searching, three squares/hour walking. It would take you two days to walk the two and a half miles to the Caves. The distance from the Keep to the Caves is fits with Gary's standard: Greyhawk city to the Castle, Hommlet to the Moathouse, the sample dungeon in the DMG, but the PCs here would be trudging through the wilderness for days just getting back and forth to the Caves.
Not sure what EGG was thinking, but that was most likely an error. Even for off-road travel, that is really slow. 1 mile is just over 17 squares on that B2 Wilderness map. According to the DMG, p. 58, even with a heavy burden in very rugged terrain, you can go 2 miles per day. Using the B2 Wilderness movement rate, it would take you over 11 hours to walk 2 miles.
Perhaps EGG was working with a different scale earlier, and then changed it but forgot to change the movement rate.
The problem with increasing the area of each square is the same as having Yggsburgh too far from Castle Zagyg -- if the places to explore are too far away, that forces more random wilderness encounters and overnight camping in the dungeon and/or wilderness on novice level characters. I.e., nearly certain death.
I don't think the Caves of Chaos should be far away, but I do think players should have to search for them. One thing I've never done enough of when DMing this module was to make the players search for the Caves. I've usually had them go from the KEEP directly to the entrance to the ravine, to move things along. But, if all the players know is that the Caves are "within a few miles of the KEEP, somewhat east," then they will be searching in the right general direction, and have to make use of the wilderness map. And that friendly magpie can squawk at them if they go too far...
"Ca-CAW, Ca-CAW, too far, Ca-CAW!"
Last Edit: Sept 5, 2012 11:21:05 GMT -5 by GRWelsh
After getting more experience with Yggsburgh, I'd reconsider my earlier statement. I think the stories you hear from the earliest Greyhawk sessions, the dungeons were 2 - 3 miles from 'base' is ideal for the newbie PCs.
If you turn the outdoor movement rates "per hour" into "per turn" they look a lot more reasonable, and the Caves become a couple hours' ride from the Keep once their location is known. That makes so much more sense that I strongly suspect it's what was intended all along and the "per hour" thing was an editorial error.