Ben said:
What do you have against state/county fairs out of interest?
Don't get me wrong, there are plenty of state/county fairs that have nice midways, but they're just the icing on the cake for those events. Thing is, they're a whole bunch of things besides carnivals, like merchandise vendors, arts & crafts, competitive exhibits, livestock, and other kinds of attractions.
Like Ian said, I'm basically referring to big funfairs seen in countries like Germany (Oktoberfest, Rheinkirmes, Cranger Kirmes) and the UK (Hull Fair, Nottingham Goose Fair, The Hoppings). In fact, they could even take rides that are usually seen in Europe, like Magic, Bayern Kurve, Inferno, Seastorm, Wild n Wet, 1001 Nacht, Roll Over, and numerous others. If there would be more than one of these kinds of carnivals, the Thriller coaster that's currently in Mexico could be used here and travel to them.