I haven't been to DLRP alone, but I have been to Disneyland alone a couple times. I lived in southern CA for a while, and would go every now and again when my then boyfriend would travel with work, I was in my early 20's at the time.
I loved my time alone in the park (although I was never 'alone', lol). I had been to DL many times, so I could take my time, and do what I wanted--eat, ride, wander all on my own schedule.
Traveling alone can be nice and it sounds like you're looking forward to your trip. Enjoy your time!!!
