On opening morning of gun season one year, a folding pocket knife folded up on my trigger finger big knuckle like a guillotine. Layed it open good. I needed stitches, but shooting light was in about an hour. Bandaged it up and hunted. Later in the day it had swelled up to the point that it was very hard to get my glove off. I never did get the stitches and it took over a month to finally seal up all the way. For several years it would hurt when it got cold.
One year in Utah the upper limb on my new bow (a Parker) cracked badly. It was the first time I had not taken a back up bow on an out of state hunt. I had extra strings, cables, bow press, everything but a new limb. My buddy was also left handed, so we shared his bow.
About a week and a half before a Colorado elk hunt, the 300 RUM I had at the time trashed a 3.5-10 Leupold. Luckily they sent me another one in time for the hunt. On the second day of the hunt, I contracted some sort of awful lower GI bug. To make matters worse, the furnace in my sketchy camper quit. There I was, spending the whole night on the crapper in 20 degree temp schitting my brains out. I got so dehydrated that everything was spinning and it felt like someone was beating on my skull from the inside with a hammer. Montrose was a two hour drive without stopping every five minutes to butt spew, so I gutted it out until mid morning the next day. Went into town and stocked up on Immodium and Gatorade. The day after, I was sitting on an about 4 foot square flat rock that jutted out of a sea of thick oak brush on a steep slope, overlooking a basin below me. It hit me again with almost no warning, so I quickly reviewed my limited options, dropped trou, and hung off the side of the rock, schitting into oblivion below me. I wasn't about to crap on the only tiny, open, level spot for hundreds of yards. I killed my elk a the next day. When I got back home, I was 17 pounds under weight, having left for the hunt at 170 pounds and coming back home at 153.
About 4 years ago I was headed for south central Idaho for a deer hunt when my catalytic converter went out in Utah. The cat was so clogged up that the Subaru Outback would barely run. I crawled underneath in the parking lot of an O'Reilly Auto in Ogden and changed out the exhaust manifold after being up for nearly 24 hours already. I had to basically drop the entire exhaust system to get it done. That sucked.
Last year on a hunt in Utah, a front wheel bearing went out on a different SUV. I limped it to an auto parts store that had a wheel hub assembly in stock and changed it out. I always carry enough tools to do any repair I'm capable of on an out of state hunt. I got tired of all those repairs, so I bought a new truck this year.