Create Members Area For 3 Pages

Hiya. I am struggling with any form of plugin to make this work, and yet I am sure it’s really simple (I am not that hot on code,although can follow instruction if it’s really simple!)

On the charity site I am working on (it’s in a sub at the moment-http://www.plom.mr-woggle.co.uk) there is a drop down menu called Membership Area. I need this bit to require registration.

Is there a straightforward plugin or way of doing this or do I need to read,re-read and re-read again? I am really struggling on this.I’ve tried WP-Members but the manual has really confused me.

Ta for your time

Andy