I'm surprised with your concern for safety that you would ride alone. My daughter is an accomplished rider, and we don't let her ride alone. Never know when something unexpected will happen and you will need assistance.
LOL...I was thinking this same thought while I was out riding. That some jumpers think that it's not safe that I'm out by myself. And I agree, it's not the best scenario. But have you ever tried to find people who are willing to ride 3-4 X's a week for any where from 2-4 hours...Most people don't want to or don't have time to do that. So it's either go by myself or don't go at all which is not acceptable for me:)
My husband always knows when I should be back by, and the general vicinity I'lm going to be riding in. And altho I do not trust any horse any father then I could throw them, I worry more about the idiots I run into out in the woods being a danger then anything the horse could do.
Becky