Yes, your HOTTAP can be plugged into a water tank system on a camper trailer as long as your existing water supply can give the HOTTAP 6 - 12 LPM (1.6 - 3.17 GPM) and 40 - 60 PSI, otherwise, I'd recommend you use a separate portable pump that can supply the needed water flow and pressure.
You can read more about it here. You can also get the pump here.