That sounds like lots of fun :) I had a great lesson yesterday (I'm learning to canter at the moment) and given that and the previous day's lesson trotting without stirrups, my back is super stiff and achey! I hope that's gone by tomorrow, because my best friend (experienced rider), me (beginner) and Mum (non-rider) are going to a different stables that offers hacks along a river, over sand dunes, along the beach, and so on. I'm really looking forward to it.
I've been on pony treks before, but they're just sitting on a sofa with legs, basically! I'm looking forward to being able to do some proper riding outside of the arena, it promises to be lots of fun. As I don't own my own horse, I don't get to ride outside of lessons - trail riding must be one of the best things about owning your own horse? Being able to just go for a ride?
If you believe everything you read, better not read.