Nice day trip
Our guide, Michael was great and took good care of us, explained the history and answered all questions. We left early morning which allowed to avoid crouds. First you visit only one tomb (the main one), then go to the great wall. It's interesting but ultra touristic, you have to leave the car and take a shuttle bus to the wall. You can take a funicular up (extra 120 Yuan) or walk, I strongly recommend walking, it is steep but you can just go as far as you can/want, it looks similar everywhere. You have about 1.5 there which allows you to hike all the way north to the last available tower and back it you're reasonably fit. Then lunch, option for the local restaurant option (rather than wetsern bufet) for a more authentic experience. Then they take tou to a jade factory and tea house which are just tourist traps but you don't have to buy anything. I think they might get a cut if you do as things ar of course overpriced
One star less only because I was somehow hoping for a less mass-tourism experience at the wall. Guide and overall organisation were great.