I was worried about the same situation that I had. I had mine done last Wednesday with 1280 on the clock, dealer said it was fine and like the one post above said its better to be over than under.
Don't worry about it. I was somewhere around 1800 cause I had to wait a week. The bigger problem is that you are going to ride the weekend and to work everyday and only add 300 miles. If you are riding the weekend I would think you would add more that each day.
Never even did a thousand mile service.....waste a money...thats what a warranty is for.....harley makes a killing off these services......anybody take there car/truck in for service? Only when its broke....
Not to worry...HD will still take your $$$. If you're concerned...$60 service manual + $75 parts/supplies = self-satisfaction of performing your own maint. Also, knowing it was done corect vs. letting the "new" HD service tech take a stab at your ride...