They are all experts, just ask them. In reality, if you are at or around the e vehicles limits, you use payload numbers, not max towing capacity. If you are significantly over you payload numbers, than you have issues, if you are not, then don't worry about it for a 10 mile trip.
If you aren't significantly over your numbers, the only other test you need to worry about it the butt test. How's it feel towing it (stopping/starting/stability)?
Couple of pro tips: If your passengers and equipment put you over payload, have them drive separate. Added benefit is that they can drive behind you, and you can use them as your review view mirror via cell phone.
Trailer towing capacities is the most "know it all" topic out there. For a 10 mile (non highway) trip, I would not be concerned if I were right on top of my numbers. Remember, the 10 mile trip at 45 mph takes 13 minutes. At 55 mph it takes ten. So, three extra minutes to take it easy. Solutions.