Some times high level people go there to exp.. maybe can get them to clear a path for you.
or bum an invisible off somebody.
This item is pretty awesome too.
http://wiki.project1999.org/index.php/Larrikan%27s_Mask
Larrikan's mask is 10 charge clicky invis (i don't know if it has a level limit though)
and when its empty can recharge it fairly cheaply.