It's totally your call, but the 1000 mile deal IS for the rear gear set, so while you are basically half way there..... It's your call.... ;)
I've got a new 2013 F150 that I got just a couple of months ago and I'm at 2300 miles now.. I'll take my first tow in a week or so and the first big trip sometime in May.. It took me about a month to get 1000 miles and that was just my daily driving commute to work and some additional driving during lunch..
I don't know that I'd do it, even if only 30 miles??
Good luck with whatever you decide..
Mitch