BackOnTrack, you can shrink the pictures and upload them as forum attachments. However, most of us prefer to use a third-party hosting site. Photobucket is very popular, although you could use Google or Flikr or some other like site. You post your photos there and then you can link to them from within your post. There's a long thread about it
here. There's also a forum help page,
here.
I like Photobucket because it actually provides you with the links to copy and paste into your forum post. Sounds like you might have a decent camera so the hosting site is probably a better way to go.