Actually, it depends...
your trailer weight will be split between the trailer axles and the tongue (or pin weight) on the tv's rear axle...
IMHO, the best 'weigh'
to do it is 4 corner weights,
but the second best (and easiest to find) is to spend $9 or $10 @ a cat scale -->
they are here
it can give you 3 weights, the steer (front) axle, the drive (rear axle) and the trailer weight (In our motorhome's case, we line up to get the tag axle as the third weight)
On the cat scale website it explains how to get all your other weights from there -->
https://catscale.com/how-to-weigh/
As you can see below, we were overweight on the F350 SRW TV by a couple hundred poubnds, but with all the additional towing accessories I added and registering it at a higher rate, we got by for the short bit we had it before returning it.
the next one shows the jeep we tow behind our
Monaco class a shown last..
a BIT more weight than the redwood and f350
40880 lbs, 20 TONS !!!!!