While updating my own equipment handling script, I had a look through canadv to see if I missed any required equips for entering places. Of course I did, but I also noticed a couple of things that canAdv seems to be missing:
8-bit realm requires the continuum transfunctioner,
the pirate zones can't be accessed while the war is in progress,
and the spring break party yacht uses "the sea" as a zonecheck, which includes a whole bunch of class checks, a level check (and I don't think it needs either) but no (familiar)breathing check.
edit: piraterealm doesn't check for the piraterealm eyepatch, and ideally should check if your buffed stats exceed the cap.
the mer-kin elementary and gymnasium can also be entered with either of the path specific outfits