Driving Up to SD This Weekend

This is basically a "break-in" period question and I know they are everywhere on TW, but I figured I'll just start a new one.

I will be driving up to San Diego this weekend and it's about 144 miles away from me so roughly with miles traveled to and from and the addition of city driving/highway driving while I'm there I'll say I will be putting just about 600-700 more miles on the truck. I have just about 450 miles on my new 2012 and I was wondering if it is safe to take my truck on the highway for that amount of time? I know some say that newer cars/trucks don't require a break-in period anymore, but some other components do require a break-in period. Also, some say 500 mile and your good and others say 1000 miles and your good. I have been very gentle with the truck, city driving at no more than 45mph at 1000rpm and on highway at no more than 65mph at 2000rmp.