CAN Photographer to USA

i have a canadian (ont) based photography business.

i have a local martial arts club that ive been doing some work for, and they often fight in the USA and they are wanting me to go to the events to shoot for them.

is this going to be difficult to do? what type of visa would i be looking at getting?

Read this: http://travel.state.gov/visa/temp/types/types_1276.html

i have read that, while i do some freelance work for a canadian publication once in a while, i do not have a signed contract with them, and they will not help me out visa wise.

on my own, i am not media. it would be nice to obtain a media visa, because is the a ton more i could do. i do have a few US based publications i have sold to, but i dont think i can obtain a visa with their help, it has to to from a canadian publication. all this was going to be a 2nd question i was going to ask.

as for my original question, its not media related.

Well, as it says on that website, you'd have to get work authorization and I can't think of a category for it to be honest other than I. If you don't qualify for it there aren't many options, the only other one I can think of is O-1 for people who are "outstanding" in their fields, so if you can put together a portfolio with pictures from magazines USCIS has heard of you might be able to get in as that, but it's a long shot to be honest.