I got lucky when I was at the land the other day and one of the GPS coordinates was fairly close to the southeast corner. I didn't know how close so I marked the distance between that cross hair and the GPS marker according to Google earth and then copied those two markers and kept pasting them in to see how many of those distances would fit between the two corners. (See picture) I guess I got lucky again because it just so happens that the total came out almost exactly to the northeast corner. Then I divided that number (7) in to 660 feet to get the distance between the cross hair and the southeast corner so that should be real close to 94 feet. I'd already multiplied 660 feet X 12 inches to come out with the inches in 660 feet (7920) and the reason for that is that after measuring my steps quiet a few time they always come out to right at 32 inches. (toe to toe) I divided the 32 inches in to the total inches of 660 feet to come up with 247.5 steps I would take from one marker to the other. It came out to 35 steps from the cross hair to the southeast corner so I plan to step that off and mark it with a stack of rocks. Then take the 248 steps back north to get the distance to the other corner and backup 16 inches and mark that corner with a stack of rocks. I know this isn't a very scientific way to do this, but it should come out close enough to keep me out of trouble.
Front to back will be a different story though because I can't just walk straight down a road and there will be brush hindering me when trying to walk so... I have a compass, tripod and laser and figure if I set it up directly over the southeast corner and point the laser at a 45 degree angle then when I walked as close to straight as I could from the northeast corner when the laser hits me I should be real near the northwest corner. Do the same from the northeast corner to get the spot for the southwest corner. How many holes can you punch in this theory?