When you say you will carry a 30-06 for back up, do you mean that you will carry both rifles into the field?
No I will not be carrying the 06 at the same time. However, I'll be hunting at least a six hour drive from home. Anytime I travel to hunt more than an hour from the house I usually throw an extra rifle in just to be on the safe side. If I can't get within my comfortable shooting range of an elk my first few days, I'll switch over to my 06 to get the job done.