Basically here is what I see.... you have a tow vehicle, you have a trailer. You can hook up and see how it goes or you can hook up, take it to the scales and see where you land. Then it's up to you what to do with your numbers. I always recommend weighing. This allows you to know exactly where you stand on weights. You can also adjust your wdh to the best position based on weights (ideally you want front axle as close to unloaded weight as possible without going heavier).
If you choose to weigh (recommended), go to CAT Scale
and find a scale close to you. You will want truck and tt loaded with a full tank of gas plus all passengers, pets, gear, etc you plan to have camping (you can skip food for this purpose). Do 3 passes (you will need something with a long handle to reach the buttons). Pass #1- just tv no tt. Put front axle on scale pad number one and rear axle on scale pad number two. Pass #2- tv plus tt no wdh. Tv as on pass number one, tt has both axles on scale pad number 3. Pass #3- tv plus tt with wdh hooked up.
Now let's look at these numbers. Pass #1 Front axle weight plus rear axle weight = total truck weight. Gross rear axle weight - actual rear axle weight= room available on rear axle for tongue weight post wdh. Truck gcwr - truck total weight= adjusted towing capacity (what YOUR specific truck with occupants can tow). Truck GVWR - truck total weight= available payload (how much weight including tongue weight your truck can handle once occupants accounted for).
Your trailer weights should be under all of these numbers.
Pass #2 take the total weight of truck plus tt and subtract total truck weight from pass #1. This gives you the loaded trailer weight (usually 1000-1500 lbs heavier than dry weight). Take the weights of the truck front and rear axles from pass 2 add them together and subtract that number from total truck weight in pass number 1 to get your loaded tongue weight (should be 13-15% of loaded tt weight).
Pass #3 will tell you if you are within all axle weights and truck weights. Also using pass #1, you can see if your wdh needs adjusting.
If you only have a deposit on the tt and do not own it yet, then get your truck weighed asap to see where you stand. Remember you won't be towing an empty or dry tt. I usually advocate doing calculations from trailer gvwr but if you want an average, most people add 1000-1500 lbs of gear and stuff etc to a tt dry weight. Then figure 13-15% of that weight for your loaded tongue weight. Are you within specs? You can now tell us. Good luck.