If you're thinking HTT, they're wonderful, but you won't find one with a king bed. Our ROO 23SS had 2 queens....DH is 6'3 and DS#1 is 6'4+ and they had no complaints. DS sleeps sorta corner to corner anyway. With the sides being soft, it's not like hitting a hard wall. While there may be a HTT out there with a BH, I don't know what it would be. If you need that much room, suggest you look at a 3 bunk model...ROO 233S. Bathrooms in HTT tend to be functional and that's about it. If you have seen the "expandable" rear slide - NOT to be confused with a HTT with canvas bunkends - there are some with a king slide and BH forward. You're going to be limited and likely have to make come concessions based on your weight. You'll note that the further the thread goes, the larger models will be mentioned. Before you get excited about anything, suggest you do your homework getting exact specs for your truck, allow about 1000# wiggle room and then start looking. Also forget dry weight as that's a totally useless #. GVWR and CCC are what matters.
In the interest of saving gas and mileage, suggest you go online to RVWholesalers and/or DRDirect and spend some time looking over floorplans and specs. If the trailer is more than your towable specs, forget it or plan to change tow vehicles. When you find something that looks interesting AND fits the specs, then start a search for those in your area. If RVW or RVD happens to sell that model, both offer outstanding prices and are very reputable. Both of our trailers came from RVW and can recommend them highly.
Rule #1 - never trust what a salesman will assure you is a perfect trailer and "sure, you can tow that no problem". Rule #2 - specs and your safety is top priority over that 30' beauty that someone just recommended and is 3000# over what you should be towing. Scratch it off your list.
Good luck with your search. You'll find the right one, with maybe a couple of concessions.