Still working on getting my 2 horse bp trailer and truck ready for towing. I have wdh hitch , I just ordered a 6" drop receiver . That is the difference of the measurment of the truck hitch (top of hitch)  and the bottom of the trailer connector truck is 20", trailer 13"-14" hard to say exactly what was level as the ground is not perfectly level. I tried to have the trailer level when i did this measurement using a level. Is this how it should be done , with the trailer level or should it be a little higher in the front?

When I do get the rest of the hitch should i set the hitch up so  the trailer is leevl as possible or more up in the front?

Thanks

You will want your trailer to be fairly level after its loaded. That means when its empty, it may be higher than level. For the best tire wear and axle support, the loads are evenly  distributed among the tires. Idealy they should all be equal, in use this isn't always possible.

If a trailer is hitched level, and then heavily loaded, the front tires will carry more of the weight than the aft tires. This can cause the trailer to sway. Many owners and I carry their hitches a little high when loaded. This ensures the front tires are not overloaded and promotes a very good trailer tracking. A secondary consideration, is that it allows any fluids to drain to the rear of the trailer.

When you're setting up your hitch's height, first weight the trailer with a comparable load. Add one or two inches to that resulting measurement and you should be in the ball park.

I have found that "level" is not always the best.  I use an infrared temp gun to take temperatures of the front and rear tires after driving a considerable distance.  Ideally, when the axles are at equilibrium, the temperatures will be the same, given you have the same air pressure in each tire.  I found that my particular trailer likes to be about 2 inches nose-high, which looks basically level to the unsuspecting passer-by.  I also seem to get better tire wear.