Personal choice, personally I wouldn't do it. Can't stand to be stuck in a truck 24/7 with another drivers. You don't need 2 sets of eyes; the team mate will probably be sleeping while you drive anyway.
Have you picked a company yet; there's some good ones in Pacific Northwest.
If you have a good co-driver teaming can a be a rewarding experience. You always have somebody to talk to, if you get tired they drive, you cover more ground in a day. To me it feels more like a road trip with a buddy than work.