I know it's not important at the moment since your not working in the worgen area for release until 7.0 i believe, but this same disconnect happens numerous times in the entire worgen area even with warden disable on a home server the wife and I are testing.
If it happens with warden being disabled, then warden is not the cause of the issue, meaning you should make your own post to describe the issue in more detail.
However, the worgen areas were fixed to be at least playable in either v6 or 6.1. I can't remember which, but at least during the time of my playthrough with my worgen, I was able to go through the entire area without any crashes. I had to use some admin commands to get past un-completed events and quests, but other than that, it should be fine for playing.
You might be experiencing a "rare" bug, maybe. Are you on version 6, the current public version of the repack?