Bassman, you have a fantastic opportunity to do whatever you want. Look further into all your possibilities.
Civil Engineering gives you a lot of time outside. But so does working for the highway dept.
You know what I would look into? Surveying. Awesome opportunity to fill a definate gap in a well paying career. I would choose a college with a good wildlife management and soils program. My major would be Land surveying (which may be civil engineering) with a minor in forestry and soils.
That way you have a job that pays you well and gives you the ability to own your own business and also allows you to have a side business consulting landowners on wildlife issues (harvest strageties, food plots, timber management). Landowners don't usually have a clue what to do with their land unless they grew up on a farm.
Name your hours, make good money, spend a lot of time in the woods, talk about deer and other game EVERY DAY! Be the expert that every guy turns to for advice and even charge a modest fee for walking around their land.
If I could go back.......

Brian