Are you an American, or have a trusted friend who is? One of the biggest hiccups with Kickstarter is creating the account to actually get paid. Sadly, last I saw, they were only allowing projects that could be setup with a US account tied in somewhere to actually transfer money.
But your project sounds really cool, and may be best done as a team effort. You have yourself set up for a lot of cool "stretch goals".
I would suggest starting by picking one site that will give you the easiest access to, ideally one that you already have some imagery or video you can use, and write up a focus project around just that one site. Calculate out your costs for getting there, getting the images you need, and running off sets of prints and a small book.
Then for stretch goals start calculating out what it will cost to get to the next least expensive site, and use that process to keep building up an expanding list.
Another good option that ties in with the above expanding stretch goals would be to budget a 'little extra' at each goal, and then after say five or six goals are reached then have the next 'jump' being a video documentary along with your photography work. If you can team up with someone who as already produced documentaries (Which can either be done on the sites, or focused on your project: Both very valid and interesting points to work from) then you likely stand a better chance of getting funded and pushing your stretch goals.
Having a Very solid and well done video is key, as are keeping a low initial target goal. You need to hook people into the project, which means a clean, clear, and well produced and edited video. (Which is so much easier if you can team up with someone experienced in film who can help you with that part)
Express a passion for the subject, a clear and logical plan, and project an air of confidence and humility. Have lots of options for donations, ranging from a few dollars for getting their name listed in the back of the book, more for single prints, reasonable price for the book itself. And dont forget to add options for people who want to go above and beyond to really support the project. Things like special edition signed prints/books, early access/feedback (ie, a digital proposal before going to print, with options. People love to be made to feel like they're part of the project and get to give feedback, even if you have no intention of listening to them.)
I do hope your project gets off the ground one way or another. It sounds really cool and interesting. If you move forward then take your time with your setup. Rushing into a kickstarter project is a great way to have it fall flat on its face. They are not easy tasks and to get rolling with kickstarter is a project in and of itself. Do keep us posted.
Canon EOS 7D | EF 28 f/1.8 | EF 85 f/1.8 | EF 70-200 f/4L | EF-S 17-55 | Sigma 150-500
Flickr: Real-Luckless