I've heard that you and a couple buddies can do it in an afternoon with relative ease. Is yours an auto or manual? if manual you have to have a shift extension, just a cheap little part but neccessary.
What's the impact for? I'd say you want to torque all the bolts properly so an impact wouldn't be the way to go here. If it proves to be neccessary for some reason... I'm pretty sure you can rent them from sears (we just borrow them from crop production service, when our crappy 80lb impact isn't enough)
I dunno about bumper... but I don't see why a reese style hitch would be an issue.
And i don't know when your tires started liking the same sex, but I'm sorry to here they are gay... must really suck to have a good Ford cross-over on you like that.....
Frank