Amm1851 points out a good rule, do as the event expects. So while they may say something akin to "a pre-1790 event...," most juried events also allow you to submit a photo of your shelter if you're uncertain, and many require you do to do so if you're attending for the first time. See what the organizers say, right?
Now you can always check with the tent makers, although remember they are in the business of making and selling tents..., and ask for their information on the origin of their design. Tentsmiths, for example has a bunch of both bell backed and not bell backed wedge tents, that they attribute to the 18th century. You might get a lead on an example of a double door wedge tent from them. They are, after all, a lot more comfortable in sweltering weather.
Pros - can be opened to vent the air heated within, during the day.
The raised portion can serve as a tiny fly in wet weather for a couple of occupants.
If you need to expand, you can add a second such tent, butted up against the "back door" of the first, giving you twice the interior space. A small piece of canvas, fashioned to overlap by a few inches where the tents are butted up prevents any water leakage when it rains.
Cons - you have a back door through which somebody might gain access to your gear inside while you are absent. A lot of wedge tents are set up so the front is readily seen but the rear portion, not so much...,
You have to be sure any and all non-historic items are concealed when you open the tent up to vent it.
You will need two additional poles, plus lines and stakes to open it up like a fly....
NOTE, you probably will want a ten that is at least 7' tall, and really 8' tall is even better (if you're allowed) giving you enough head room to stand within the tent. IF you have a lady in camp who is dressing, she will appreciate being able to stand while dressing.
LD