As stated, there are many ways it can be done. I used to ride in wagon trains a few times a year, they ranged from 2 days to 9 days. They generally averaged 20-25 miles a day.
For these rides we would tack the horses up in the mornings and have them ready to move out, then tie them or have a partner hold them while we drove our rigs up to where that nights camp will be. The people or organization putting on the ride would have a bus or trailer to drive the riders back to their horses. (Breakfast would either right before or right after moving up the rigs.) Once everyone was back to their horses it would be time for them to call "Riders up" and "Wagons ho".
At least every 2 hours was a water break for the horses (and potty break for riders). Sometimes we pack our own lunches and snacks, other times the food is provided by sponsors. (These were usually fund raiser rides for different charities.)
Once at the camp, the horses are cooled, watered & fed. They are either tied to the trailers, to trees or picket lines. If the horse is hobble trained it can be hobbled for the night. A lot of places frown on the portable electric fence or portable corrals, some allow them.
Then it's finally time to set up your camp for the night and have a meal before hitting the hay. In these rides there usually isn't a lot of late night drinking, because morning comes early and the horses have to be fed, tacked and rigs moved up to the next camp early enough so the train can get started, most of the time we would head out by 8 a.m.
In these rides the #1 priority is rider safety, followed by the health and safety of the horse. Oh, and drinking while riding is FORBIDDEN.
They were lots of fun!