help spacing out blog post around page (custom fields?)

Ok so what I want to do is create a blog post but have the content of the blog post spaced around the page without having to hard code HTML into every post.

So I figure hard coding the html into the theme and then spacing out where the post data is displayed is my best bet for using wordpress effectively.

http://weswilson.ca/stuff/layout.jpg

is what im trying to accomplish with any one blog post. so in 1 & 2 i would want two different paragraphs of text, and in 3 a description of said text.

using a custom field I feel like i could do this and just put one paragraph in each field, use the main post area for the description, and use the excerpt for the RSS so its not so crazy.

I was looking through the codex, trying to figure out how much data I can put into these fields and was wondering if I am going about this the right way? is there another way? a better way?

http://codex.wordpress.org/Using_Custom_Fields

thanks for all your help in advance 🙂