Sounds like a good combo for you. Weight issues and length issues always are a good thing to consider when purchasing a new or used fiver and of course what your tow rig is designed to pull .
Our fiver is an older 2003 model and it weighs at around 12,000# or a little more when loaded for camping. The newer trailers are constructed out of lighter materials so it seems as though a 34 footer will weigh about the same as ours or even less. That being said our truck is always pulling strong with our trailer attached.{ rated at 15,650# tow capacity} But I always watch the EGTs and temps.
2003 Sandpiper 32 ft., 2006 Dodge dually Big Horn, 4X4, Cummins H.O., 6 speed, jake exhaust brake, Edge Tuner , turbo timer, AFE stage II intake, S.B. clutch, Toyo Open Country Tuff Duty tires, KF7/AQD-SAR139