If you
really don't have that much stuff, I think it's doable. We had free use of a moving truck from our realtor, and that plus our cheapness pushed us in the direction of doing it ourselves last March. (Although doing the same in July might have been a different story...)
Since it's only a 2-mile trip, you could do it in two parts like we did: first all the boxes, then all the furniture. I was somewhat obsessive in my packing and organizing, which I like to think helped speed things along.
However, we didn't have anything we couldn't lift between the two of us. I would hire help for that stuff (not ask friends unless you offer to pay them). We used
http://www.mapdispatch.com/ last year to find a couple guys to move some heavy furniture we bought on craigslist. You can name a price/see what people will offer. Our experience was kind of mixed, so I'm not exactly recommending it, but you might want to check it out.
Good luck!