Back in the day when I was a kid we used to take our horses out to the family cottage in the summer and ride the mountainsides in B.C. With nothing but a halter and a lead rope. If you got thirsty, you drank from a stream. If you got hungry, you gorged on Saskatoon berries. If you got hot, you'd just go for a swim at the boat launch (without getting off your horse). You'd be wearing a swimsuit and flip flops anyways, so it didn't really matter. The water skiers had a bit of a trip though. The time you could leave was at sun-up and the time to be home was sun-down. Life was so simple.
Now, I'd never let my daughter do the same as it wouldn't be tolerated by the "lake association". I'd also be too worried about dirt bikes, quads, hunters, partying drunks, cougars and bears up in the mountains to let my daughter take a horse up there.
Oh how I miss the good old days!!