Welcome virtuigs, glad you joined our forum! You will not have any problems towing the 230DS with your V8 Tundra. The 230DS has a base empty weight of 3883 lbs, and with options, our 230DS weighs 4200 lbs, which would give a good safety factor plus cargo capacity. I would recomend a weight distribution hitch since the 230 has a fairly heavy hitch weight of 497 lbs without the propane tanks full, about 550 with propane. I have been using a 2006 Nissan Xterra equipped with a equal-i-zer sway control/weight distribution hitch to tow ours and the Xterra's 265 hp / 285 tq handle the job well. The tundra's 300+ tq at around 3000 rpms will work very well.
Let us know when you get it, we need more 230 owners on here!!