User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6050823-20130924212543

For any people wondering about the Unknown Sea of Trees, there is actually afew quests you can do offline in the area but, after you do one of those quests, it will not appear again and you'll only be able to fight them in the Unknown Sea of Trees when they appear in the forecast or if they appear randomly while your freehunting other monsters. Also monsters in the Unknown Sea of Trees in freehunt can escape or leave the area without a trace and escape completely if enough damage hadnt been dealt to them.

When you guys make it into High Rank in the Guild House or Online after killing Daren Mohran, you'll be able to do a version of the Unknown Sea of Trees freehunt that has High Rank items in it like ores, bugs, and monster materials and even has High Rank versions of those monsters.