Can I hire a driver with a car?

HI. I am in Mozambique over Easter. We want to travel from Maputo to Beira via Vilankulos/Bazaruto and then spend time at Gorongosa but spend max. time with son working in Biera rather than buses/waiting for expensive flights.

How easy/expensive is it to get a car with someone to drive us? Do you have any reputable tour operators?

Thanks for ANY advice on the above areas.