For what it's worth, the 5th wheel trailers that come with generators permanently installed normally have them in the front storage area, with an exhaust pipe simply exiting the side of the RV. I'm sure TT's and MH's are similar.
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2013 Rockwood 8289WS w/Diamond pkg
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)