My wife is fully capable of hitching and unhitching the trailer. I think it's critical that she be fully aware for both checking to make sure it's done right by me (she needs to know what right is so she notices where I've messed up) and also in case of an emergency. She wrote out a check list she still refers to and about every fifth or so hook up she takes the lead. This is the result of an incident where my buddy's dad and mom were at a State park several days away from home and he had a massive heart attack. An ambulance came and took him away and she had no clue how to hook the truck up to the trailer, etc so she could haul closer to the hosptial/town he'd been taken to. A few good samaritans in the campground
came over and while one showed her exactly what to do the other wrote it all down step by step and they talked her through it as she did it herself next. The good news is the heart attack was survived but guess who had to do the driving back home and dealing with the trailer the whole way - and she did a fine job and followed those steps every time she hooked up or unhitched. Over time she added more things that she learned herself.
They managed to do several more years of great camping before he was finally unable to travel at all.