Maybe mist them every hour or two?
Certainly give them shade and shelter from wind until they perk up.
If they are wilting, maybe trim off a few leaves to reduce transpiration, but I would only do that with diseased, yellow or curling leaves.
If the potting mix drains well, maybe flush with warm water to reduce salts and fertilizer, then give them only water or dilute fertilizer until they recover from the stress of the move.
(I assume it was really hot in the U-Haul, but they did not dry out.)
P.S. I am NO expert on peppers, so take these suggestions with some skepticism.