That's what I was thinking, a portion of land that is closed off maybe with only Yews and Magic trees. If it were 75+ to get in, then Maples, Willows, Oaks, and Normals would be too easy to cut and a waste of space in the guild. Take a comparison, in the mining guild there aren't any iron ores, copper nor tin. Why? Because there are easily accessible and are abundant all over runescape.