Long distance move from San Jose to Texas

I am relocating from San Jose to Austin, Texas, and need a reliable moving service for a long-haul journey. I have a lot of household goods and some outdoor equipment that needs to be transported safely across several states. I am looking for a company that can provide a firm delivery date and high-quality packing services. What are the benefits of using a company with its own fleet for such a long distance? How can I ensure that my belongings are protected from the heat during the transit?