There are weight restrictions based on your tow vehicle. Do NOT believe the RV salesman when he says you can tow anything with your truck. Look for and compare the figures of what the truck is rated to tow and the max weight of the trailer to include the pin weight. Keep in mind that the empty weight is almost certainly going to be lower than reality and no one tows an empty trailer to use. Look for the loaded or GVW of the trailer and make sure the truck is rated for it. That also includes the "toad" or vehicle you intend to tow behind the trailer for the load.
The tow vehicle is most likely where you will get in trouble given the situation you are thinking of. Again the RV salesman is NOT your friend in this situation so do not rely on them to determine what you need to tow, especially double towing! A one ton PU is still a light duty truck and has a finite limit on what it's capable of towing. Just getting it rolling down the road is not the main factor. You have to be able to control the load and stop it. Your stopping distance towing will be much longer than the truck alone.
Not all trailers are built with a frame you can hang a hitch on to tow something behind it. You'll also need a brake for the vehicle behind the trailer as well.
Some states do have a restriction on towing double. You can get a truckers atlas at a truck stop and look in there for the list of states that do not allow double towing.
As long as you are not commercial you do not need t stop at weigh stations unless they require RV's to stop as well as commercial trucks. If they do they will have a sign saying RV's must stop. So far I haven't found a state that does in the 36 states we have been in.
Look at this site www.escapees.com
and go to the forums for info. If you can't find the answer to your question there, it probably doesn't exist. :wink: