I know what you mean, I usually feel the same way about making the first contact and don't do it. But I think its different for a tour, because you're not in the area usually and they have a limited time to see you.
I go to Scotland sometimes and I have 2 guys who both want me to contact them when I am in the area, both of them asked me to do this before I'd met them. They both want to see me, but dont want to check online every day to see if I'm there (lazy).
I assume that they are single, other wise why would it be ok for me to make the first contact? having said that, when I do text them it's just a simple one saying 'Hi, I'm in town this week' No name or initial and no kiss. Also had it with a guy in Liverpool. He wasn't around when I was and rang me asking if I could contact him when I'm next in town.