Small river outfitter needing radio solution Hi all,

I own a river outfitter that operates on a few mile stretch of river. My business requires a lot of attention to logistics and coordination of busses and box trucks etc.

 I need my employees to be able to communicate to each other within a 10 mile range to coordinate tubes and kayaks getting delivered in time for the busses full of customers coming. I will have 2 small busses, one box truck and a Jeep Wrangler that need mountable radios. I will also need 4 handheld radios for my employees on the ground and in the river. 

Is GMRS a good solution for this?  

The area has small hills and lots of forest. Medium amount of developments and houses.

Thanks in advance