Different Kind of Weight Question

The front legs carry the pin weight when parked and more. Think of a lever, hooked up the truck is at one end of the arm and the trailer tires at the other. When on the legs a pivot point is added toward the wheels and the weight forward of the legs is actually counterbalancing and taking weight off the trailer tires. You're overthinking. Load it up for the first trip and weigh it again on the way out. Compare the FA, RA, and trailer weight against the ratings.

Try to park it headed north or south to minimize wind load, or whichever way is the predominate wind direction. If you're worried about it. And put down the rear stabilizers.