www.ecfr.gov
The Federal government has certain exceptions for farmers when it comes to license. That being said you have to check with your home state to 1. see if what you are doing counts as being a farmer. 2. What special license or endorsements you need if over 26,000lbs (GVWR or actual). 3.If you are a farmer what type of vehicle registration you need. Under the feds and MAP21 each State had to have 1 way to identify farmers to take advantage of the exceptions. Some use the license plate, some use a form to be carried in the vehicle... For the weight you are carrying if you have too small of a truck you will just wear it out and or break something.
It all depends on the State. Several (I think more than half0 have a licensing requirement for vehicles over 26k (GVWR or actual) that includes RV's. It is up to your home State.
The law is typically based off of 2 weights (which is the same as the Feds use) the vehicles GVWR or the actual weight whichever is greater. You can look it up in the regulation section of www.fmcsa.dot.gov under 390.5 (you can also find the definition of Covered farm vehicle here). The feds only care if you are crossing State line and are using the vehicle for commerce. For example you are pulling a trailer with an RV and inside the trailer is your race car that you race for money or have sponsorship on it. (you do not have to win money just race for potential money) Most States use the federal regulations for their own people with a few exceptions. Some don't require a CDL but they require an endorsement that is for a vehicle that would otherwise require a CDL if used for business.
if the tow vehicle GVWR is 10k or less then no. 3/4 ton truck usually stay at 10k or below. But you never know what the manufacturer is going to do to sell more trucks.
