I was sent from DFW/GSW for 737 upgrade sim to MIA and Boeing because the CAE sim was broken. Our Sim-P lived in PHX, normally commuted to DFW, and was responsible for housing/cars/etc in DFW. But, in MIA, he was given positive-space travel, rental car, hotel and per diem. Good deal to be TDY, even for 5-10 days, instead of going to DFW.
I assume this would apply to CLT Sim-Ps who were sent elsewhere.