Coleman roof ac on travel trailer is dripping inside camper where should this be going?

Water from the A/C, whether it is rain water or condensation water should stay outside the coach and run off it's roof. If it is rain water, the rubber seal that goes in between the A/C and the roof may need to be replaced. If it is condensation water, the drain for it may be plugged up. Take the cover off the A/C to check for this. It is possible that the water is condensation forming on the duct work from the cold air going through it. It can take a awhile for RV A/C to remove the water out of the air, thus using a small pail to catch it in the mean time is advised.