Add fields to Post page to populate each post as a template?

I am developing a blog for me and all my hiking buddies. When they go to post a new hike, they are typing a description of the hike along with pictures and even a /gpz file from their GPS units which I use with Google to create dope maps and profile graphs with on the fly. Really cool – amazing.

PROBLEM is that, in addition to the descriptions, I need a way to also ask them for specific data that must be included in each post (all CSS stylized in a floating fancy right div by me the admin). Data like “Geocaches Found” where they list them and also can add a url to the cache on the geocaching.com site, also stuff like “Elevation total”, “Distance”, “Difficulty”, etc. Every post has this data – just not in a structured format.

So what I want to accomplish is this:

1. Ability to add these fields within the post table of the sql database.

2. Input fields for each query within the “write” (aka post screen).

3. Ability for me, the admin, to be able to add each string to the post template – all CSS’d up and cool. Ability to display instances of more than one string entry in each field (i.e. a listing of multiple geocaches found).

Any ideas deeply appreciated folks!