I"m not sure of how International agreements work but you should go to your Dutch Auto Assoication (AAA look alike) and get an international driver's license.. This, combined with your home license, gives you privileges in the US.
Now.. In most of the US (LAWS VARY FROM STATE TO STATE) a basic driver's license gives you the privilege of driving any NON COMMERCIAL vehicle, car, truck, motor home, as long as it is not driving for pay. Some commercial driving (So long as you are not paid to drive) is allowed (Example.. When I worked as a roofer, I got paid for nailing shingles, not for driving the truck,, So I could drive the truck to the job)
But then.. Just to cover myself I wrote the commercial driver's test of the day.
In Michigan. Commercial drivers are licensed by vehicle size and type and/or cargo type (IE: Haz-Mat, or People, both take endorsements)
But a regular "Operators" license.. the basic driver's license, is all I need for the 26,000 pound RV