When we were coming back from the Daytona trade show, we stayed at a local hotel and brought out new critters in our room. I kept them in their original containers because of easy to transport and less contact with the new snake/less stress. I covered the top with a small towel to keep things dark for them, place them half way on a heat mat + t-stat so they can move back and forth for heat, and kept them in a room with little to no draft, like the closet. Idk for 5 hours you would need to do all that. I have seen those who travel with their reptiles often for educational shows use similar methods. But I don't know how cold your office is so the insulation may be necessary. The room temp I had the critters in was about 78F.
Also, since you would need to quarantine them anyway, you should stay with paper towels for bedding.