Pacific Northwest Outdoor Wedding Suggestions

My sister is planning a small (40) wedding in mid-July in the Port Angeles area of Washington. The ceremony will be held at Hurricane Ridge in Olympic National park at 3:30 pm.

The reception will be held in their backyard (lots of fruit trees) and grass.

This is the second wedding for both; my sister in her late 30`s and would like some traditions, some Northwest theme, some casual. So far, we know the menu will be a salmon bake and be "northwest themed". Budget is important but not a sticking point.

We need ideas for:

1. Decorations/ table
2. How much floral
3. Should we have a DJ/dance floor
4. Invitiations
5. Favors (are they necessary)
6. Activities

All suggestions are welcome. Thanks.