Hot dogs up here in the Midwest don't have to always have anything on them (many "lazy" mom's will cut them up and serve them in macaroni or in baked beans, like mine did as a kid, but I never liked that), and they NEVER have "slaw" on them though that I've seen here, that's the first I've heard of people eating them like that.
Most people around here have Chicago Hot dogs, with lots of onions, ketchup, mustard and sweet relish.... or sometimes cheese/chili instead (ie: the chili cheese dog)...But a very common thing at hot dog joints (Chicago Hot Dogs are "supposed" to be one of the famous things, but most of us like "the pizza" more) is just a plain "cheese dog" where they have it drenched in that liquid sauce they put on nachos at the theater or they use real melted shredded cheese, depends on the place. But a Chicago style hot dog is usually with onions, relish, mustard and ketchup.
Corn dogs are sold frozen at the grocery around here or only at fairs/carnivals. My fiance actually likes them, but I'm very "meh" about them, once in a while, as I did have them as a kid sometimes.
We have something called "breakfast bundles" around here, where you basically have a pancake wrapped around a breakfast sausage (I don't know what a "breakfast sausage is in the UK, it's a small brown pork sausage with spices/seasonings here) and most like to dip it in syrup, but I hate syrup. It's on a stick like a corndog, probably made the same way.
Bratwursts are big around here too, though. I like a good brat, with onions, mustard (hate ketchup usually), sweet relish and it has to be grilled right too.
I'm pretty sure I know what a "fanny" is in England, but around here we "thought" it meant an ass in England, I've been told it's "something else" and it's for the lounge...We use it only for "fanny pack" for a "belt bag" like My.December said, it's a small bag you wear around your waist at the hip to simultaneously keep crap in on like a vacation (or a "holiday" in the UK?) like keys, cameras, money, etc...and appear to be stuck in 1990...Usually worn by parents who don't give a crap about appearance...or, by some of us bodybuilders to store their MP3 player in while working out. I have one, so I have a "fanny pack" I guess, my fiance teases me about it, but I remind her in the gym many guys will do that, as you can't wear the armband MP3 player holders when you're working out your upper body, it doesn't work.