Julian has built up an immunity then!
How strange is it for two people to be carrying a box down the street? I mean, It's odd, but I don't think it's that odd since many people would be moving about carrying stuff for the carnival. Can't think of any convincing lies to carry the box outside, unless I had some pen and paper. Or I could have Ragni wear the feathered hat and pretend to be Bardin or something, hah! Yorri could pop the thing right open for us, and he's only a neighborhood away.
I'm thinking the window approach, but are there enough quiet allies about where Ragni and I could find a quiet spot to bust it open unmolested? I would probably lower it, as my S is the same as Ragni and my Dex is higher (Ragni has Dex of 18!).