Congrats on your new TT! You will absolutetly love having a slide. :C
I highly recommend that you go to a scale and weigh both the TT and TV. It can be a CAT scale or one along a highway or something like a grain elevator. You can also use these weights to determine your actual TV payload capacity and to fine tune the WDH. (Requires 3 passes to get the required weights.) On our last KZ, I found the tongue weight was higher than average at almost 15% and nearly double the factory dry figure. Had to buy new spring bars as a result.
All loaded up, you may find that you only have in the order of 200 - 300 lbs of cargo carrying capacity left over. On our last KZ, if we were to travel with just one full holding tank, we'd have been overloaded even though we were loaded with very ordinary stuff and only had some minimal mods done. Each person's circumstances will be different and it will also depend on any mods or upgrades that have been done. Dry weights published by any TT manufacturer are of little use and always go up significantly.
I weighed everything before and after loading up our new 2014 KZ TT including upgrades and mods. See this thread for our experience on the weights for our new Spree 262RKS.
Actual weights of KZ Spree I still have an unaccounted for increase in factory dry weight versus what it weighed after arriving at the dealer of over 100 lbs. It really bugs me...
😞Also, there's usually just 2 of us and occasionally, our dog so we are on the lighter side of cargo compared to those with kids (and maybe their friends) and things like bikes.