I've got a few suggestions.
You're banner doesn't settle well with the textured background you've used, which I realy like by the way.
Bushcraft is all about the full experience, touch, smell etc. and I can see you're thinking this with the material you've used as the body background. Why use digital elements in your design at all, why not carve the banner, stitch it, or paint it. Then scan/photograph it into photoshop or similar to play with the contrast and colour balance until your happy.
I wouldn't put the introduction to your site on the right hand center column, the sign up for the account is so wide that it's pushing the column too far over and restricting its width, and creating blank space to the right of your laft hand column.
Have a think about perhaps swapping your into with your atricles, as these seem to naturally fit into this column width and would naturally appear here in most sites. This would free up your main left hand column for updates or blog articles.
code wise, You've got a hybrid of CSS aligned DIVS and Tables, which will cause you headaches in the long run, its a beast setting fixed widths/heights on tables which wil often ignore any css dimensions you give them in favor of stretching to the size of internal content which is monkeying around with your div layout. you can see this as you stretch the browser width out and content isn't centering in the same place.
Have a look at
http://www.code-sucks.com/css layouts/
There are some pretty good frameworks to build your site on there, that would accomidate your content without dictating the design too much.
Finally, get those pictures up on Flickr, you can get really really easy to set up Flickr site portals that will allow you to upload images from anywhere, your phone, a computer etc. and appear in your site in a browsable, commentable format. Which is great when your out and about bushcrafting. Take a photo on your phone, upload it to Flickr and give real time updates on your bushcraft weekend etc.
I hope this helps, if you need any more advice let me know I eat and breath HTML, CSS, Javascript at work, it would be nice to put it to some karma based goodness.