Using a modified version from another server, I got OOG to work up to character selection. I'm thinking it has something do with the token, which is not present in Option.ini for L2HeyDay. If anyone makes progress on in-game or OOG walker, please let me know!
(Ignore the L2KOT text. it's part of the patcher I'm using (

). Connections are to L2HeyDay)
I found videos on youtube of others with working bots, but I'm not sure which ones they used since the videos were by people reporting the botters LOL. One example below. He has a bunch of videos on his channel with more of the same.