My suggestion would be to plug your trailer power supply into an outlet, turn everything on, and one by one switch off each breaker and see what area/appliance shuts off. Then, using tape or lable paper, re-lable the circuit panel.
The drip is not normal, I would drain the water heater, remove the plug and use teflon tape, it can be found at most hardware stores.
As to the manual, I am trying to find a resouce at Cruiser RV, I will get back to as soon as I find out.
Good luck man,
2006 Nissan Xterra
B&M Trans Cooler
2011 Nomad 206
Panasonic/Pioneer/Kicker ~ Audio/Video System
Days Camped /2009 / 33