As mentioned by APT... your payload capacity of the truck will be your main concern. Typically, the tongue weight for a TT will be close to 15% of it's total (loaded) weight. Since you don't know what that weight is and can only guess, most experience TT owners here on rv.net recommend that you use the trailer's GVWR for this purpose. So, in your case the trailer should have a GVWR of approximately 10,280 lbs. 15% of that is 1542 lbs. You indicate that your truck has an 1820 lbs.....so that only leaves you 273 lbs for you, passengers,tools, camping equipment, hitch and anything else you put in the truck.
Now, of course, you probably won't load the trailer to it's max capacity, so you will probably have some leeway to play with here. But....be aware that even though the mfg says the unloaded weight (dry) of the trailer is 7665 lbs, it will more than likely be several hundred pounds more than that. Your only way to know for sure is to have it weighed....maybe the dealer can do this for you. By the way, this goes for your truck also. Get it weighed first!
Hope this helps
\
Ron
