I believe concentrate also do a 3 section staff
(I know how he feels, I went to stonehenge one year for solstice and wasn't allowed to take my staff in because it was classed as a "weapon" I then proceeded to see 50 people dressed as druids carrying lumps of wood about 8ft long, as you can imagine I felt slightly cheated)
the other way round it is to just lie. I normally say I'm a performer performing inside and ask lots of awkward questions until they forget they stopped me for the stick

could always stick an umbrella to the end and claim it's a parasol.
edit:
You can get 3 sectioned staffs
HERE