Best way to get a girl to reply is to send her screening questions. Is she good enough for you?! This will present a natural challenge for her to prove to you that she is.

A successful example: "Hey I saw your post, I am looking for exactly the same thing. So tell me about yourself. do you think we'd have fun?
I'm a 28 year old outdoor wilderness instructor who needs to relax and have some adventures on my off shift. Im interested in swimming hiking camping and cycling.
Let me know a little more about you and maybe we can go from there."

This message has a few DHV's, screening questions ans shows that i'm adventurous and like to have fun.

She replied the next day with "Hi! All of that sounds great. I just worked all night at the hospital. I am an RN..."

Just thought I'd share this with you guys. Good luck! Keep posting!