We have done this a couple times. I like it, I think it's fun.
I believe the girls will like it , especially if they have never been onna horse before.
The ride is about a hour, it is a slow trail ride with several people, nice and leisurely. If your lookn for a rip roar'n shoot'em up gallap type thingy,,this anit it.
I would try to do the early rides, you hava better chance of see'n more wildlife.