I am interested in running a small fan for ventilation so I guess tapping into the wires would be enough. Our thoughts were to put the fan on the mid to back of the wall backing the shower in the loft area but we also like placing it in the headspace over the staircase since that would pull better air flow from inside the main area of the trailer. We figured that pulling wiring thru the storage cupboard over the shower would keep it out of sight and out of danger.
However after a conversation with a neighbor last night we are considering another option. They had a 5th wheel stick built with a similar arrangement to our Scamp
5er - storage space over the bath that opened into the sleeping loft and an A/C unit with the airflow vent blowing into a corner. They fixed the problem by adding a vent through the storage space which allowed air to flow directly from the A/C unit to the loft area through that vent.
He cut a hole in each side of the storage area, used a short length of dryer vent hose to connect the holes and framed out the edges with inexpensive trim moulding finished to match his walls. By directing the airflow vent on the A/C unit into the pipe he got A/C into the loft space with no restrictions. It would work well too if you were just running the fan. He showed us exactly where we should cut the openings and I really think we will try this as it is a simple fix that doesn't involve messing with electricity or structural parts of the trailer. And that is important to both of us as neither of us is mechanically inclined. Hole cutting and trimming out we can handle.
However we still would be interested in knowing the answer to the original question so bring on the answers please. Also any opinions on this neighbors suggestion would be welcome.