OK, here is one fence panel.

http://www.savefile.com/files/4603784

This is a zip file of the fence section.pp2 and image file to go into runtimelibrariesprops, I think it will extract properly but you might want to put it somewhere else.

The posts are parented to the fence panel, you can move or delete posts as needed to build longer sections of fence. I have made the posts longer so they go into the ground and can be adjusted for hills.

I am not entirely happy with the posts top, poser is smoothing them a little more than I wanted , but the look bad with smoothing off.

Any comments or suggestions are welcome. 

I have an idea of what a gate would look like and am working on that today.

Regards.