I bought a torque wrench and check my Fifth Wheel and truck wheels regularly while on camping trips. Especially since they tell you now to check the wheels on the tow vehicles after 100kms after the garage takes them off for brake inspection or tire rotation or whatever reason and same goes for the trailer.
It's an easy thing to do when you get to another campsite or just before leaving. Like the guy said when I had tires changed on my Fifth Wheel mid trip to Newfoundland, you won't feel a wheel coming loose on a trailer before it comes off completely unlike the tow vehicle. I also check tire pressure on a regular basis before I leave the campground since that's when you get the cold tire pressure.