These samples will indicate soil conditions and water table depths. However, it would take a pretty lucky shot to find a buried stump. You might want to check with long-time neighbors on adjacent property and ask them what they know about your site. That could unearth many sins. It's most desirable to have public utilities, such as water and sewer, electricity, and gas, serving your site.
Public utilities are more reliable and easier to maintain than other systems.
To make sure these utilities are adequate and accessible to your site, check with your local building inspector. Natural gas for heating is much preferred over other forms of heat, such as propane or fuel oil, because it is more reliable and economical. If your site does not have public and sanitary utilities, then you have more homework to do. First, check the water wells in the neighborhood to see how they are functioning and if they are producing usable water. Check with a local well driller for his knowledge of the area.