If you're going to get a hot patch done, then I would get them to take
care of the base prep work too. Most important is that it be
compacted. And I agree to forget about the concrete, as it isn't
buying you anything. But it's going to be hard to find anyone that
wants to do that small of a job. You cou go with the cold patch
material sold at the home centers. I've used it for similar work and
it's still there doing fine 10 years later.