Sounds like a lovely time, even if it's now smaller than it once was. And I'm sure there'd be a market for the article. One place you might consider--I know this is going to sound unlikely, but--is Communities and Banking magazine. It's a really wonderful magazine devoted to supporting and empowering lower- and middle-income communities in New England. It runs articles on all sorts of subjects--immigrant communities and how they're doing, elder care in rural Vermont, early childhood education in cities like Springfield, food deserts in places like New Haven, reintegration of former inmates into the community, etc. And they've done articles on Native American economic development, etc., in the region, too. If you were to look at the economics of the powwow and what it means for the community, I think you'd have a sure-fire winner. Also, I know the editor :-)