The easiest path we found for getting from the front area to rear area of the trailers was to run down the ceiling air conditioner foam ducts.
Easy access on both ends as there is usually a ceiling mounted cabinet near-by.
I just dropped all of the air conditioner vents along the way and fished my wiring from vent to vent. These are usually just six feet apart going down the center of the trailer.
Just be sure to patch where you entered the foam ducts with expanding foam sealant to prevent the engineered air conditioner air pressure to remain the same.
I have VIDEO and RG cables for my Ham Radio running through my air conditioner foam ducts...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS