The central part of the forest could be a maze, like you have to know that path that takes you through it such as up, left, straigh, down, up or something like that. The pattern could change every new game and Toma could be the one to tell it to you. (somehow he would know it). What do you think? Then the party could comment on how tricky the forest seems if they enter before talking to Toma, if they talked to him, they would comment on the path he said to take. What do you think of this? I could give the Cursed Woods a cursed feel to them. And it would vastly enhance the area. Much better than going straight north to Frog's Burrow.