Wordpress Posting Template

Hello. I am fairly new to WPMU and Buddy Press. We want to use these to develop a community "journal" site. The best example that I can use to explain how we want to have blog posts is to look here at this singular entry --- http://www.trailjournals.com/entry.cfm?id=297632

We would like to somehow implement sitewide on all accounts created, the ability for hikers to add their starting and ending points, along with their daily mileage.

Being so new to WPMU and Wordpress in general I am somewhat getting overwhelmed looking at Plugins, etc so I am hoping someone here more experienced might have an idea how I can achieve this.