Very few shows have rules against photos on Canvas, so I would not worry about that much. Many of the better shows require limited editions, usually of 250.
I have personally never seen an official at a show check that you are doing limited editions, but I would not try and cheat here.
I was hesitant to do limited editions in the beginning, but if you do the numbers, its unlikely you will sell out of many editions.
I have been selling my photography at art shows for several years now. For the first few years I sold traditional framed prints under glass.
I soon discovered the difficulty of transporting larger pieces with glass and another problem nobody has mentioned here. Most of these shows are outside
Direct sunlight on a framed glass print causes the internal temperature to rise very high and causes outgassing of solvents with inkjet prints, fogging the glass.
The only way to fix it, is to take it apart and clean the glass. A Royal pain in the A**. Reflections with the glass is another problem. I used to have customers say
I really like the picture, but the frame doesn't match my furnishings, so I would lose the sale.
For these reasons and others, I decided to start doing Gallery wrapped canvas. All my problems went away and sales increased. I would never go back to traditional framed prints.
I see some of you here have expressed your distaste for canvas, that is fine, but the bottom line is, most of the buying public does not share your distaste for canvas prints.
Doing art shows is a business, I have learned over the years that it doesn't matter what I like, it matters what the customer likes. I wasn't that fond of canvas in the beginning,
but have now changed my mind. If you don't give your customer what they want, you will be a poor business person and soon fail. You need to keep an open mind, test and see what sells,
when you find it, go with it. You can't argue about personal taste, but I have to chuckle when I see some here saying, canvas looks cheap, or they wouldn't have it in their house, while some of us are making a good living
selling it to the public that likes it.