My spouse is highly skeptical of all rides except Ferris wheel
Your spouse is a very wise man. While it's certainly true that the vendor does not want the ride to fail, and most do not fail at a critical moment, these rides are not inspected by anyone except the owner on a regular basis. The more violent the ride, the more stress is placed on the parts, and eventually something is going to let loose. When that happens the ride generally just refuses to operate, but the occasional injury accident is not unheard of. You might note that when there is an injury accident, the owner of the ride may well be out of town with an hour or two.
Then there's the added attraction of someone's digestive tract having a critical failure at an inopportune moment. Think: Some genius of a soccer-dad has just scarfed down two generic tube steaks and a mystery meat burger alongside two or three pounds of sugar in various guises, and he's chased the entire business with a carbonated concoction of water, sugar, caffeine and colors not found in nature. If you're really, really fortunate this clown has had one to three beers along the way - just enough to get his bravery up.
So now it's time to take in the rides - oh boy! Typically he's brought the old Ball and Chain along to help wrangle the three snot noses, and the two oldest insist on riding the slingshot octopus, a ride that is referred to by carny workers as the vomitron. The youngest doesn't really want to ride the octopus, but because the older kids will tease him unmercifully and call him a real wuss if he doesn't, he must go as well. And because mom had more sense than to ride this contraption when she was five, and since she's gotten wiser with age, mom flatly refuses to ride the slingshot octopus with the youngest (which leaves the obvious question about just why any woman this bright would ever get married to some guy who pulls stunts like these, but I have no answer for that one). So, back at the ride...
Since mom flatly refuses to get into the bucket of this contraption, that just leaves good old beer belly dad, last survivor of the neighborhood rat pack and not afraid of anything, to ride in the car with the youngest.
Just what do you think is going to happen to the people in the next three cars behind dad and the youngest when the slingshot octopus lives up to its owner's billing? Here's a brutal fact of life: The operator does not stop the ride for projectile vomiting.
I've been going to carnivals, State and County fairs since I was old enough to lie about my age and tall enough to bring it off, and believe me some of that stuff is held together with baling wire and prayers. All of it is easy to clean, and there's a reason for that. I'll stick with the Ferris wheel, thanks.
As careful as the old boy might be about the rides, you have to be very careful about the food. If you get hungry and actually want a meal, find the tent where the vendors eat. They'll generally have picnic tables or someplace to sit down in the shade, and they'll serve regular meals instead of hot dogs, burgers and mystery meat. Kiosks or hot dog stands - eat at your own risk. Most are okay, some are good and a few will make you sick.