I did a TTD session in Mexico last November. It was the brides one and only dress and she was planning to wear it back home for a party with the people who couldn't join them on the trip.
We kept it to the pool area so not to get it too "trashed". After everything was done, it dried in record time and she swore it looked nicer (whiter) and felt more comfortable after it had been through the TTD. The middle pic in the my signature was of the very last second of the dress before it entered the pool. All the guys suites and brides maids dresses were also fine after.
Don't let the "trash" in trash the dress mislead you, no dresses need be harmed in the making of great photographs. But if you are ok with it, all the better