The Forest River Sierra 3660MB packs a lot of ingenuity into one floor plan: a mid-bunk section for the kids, a private front bedroom, a rear living area, and a kitchen island that makes the space feel more like a home than a trailer. Owners consistently praise how livable the Sierra 3660MB feels day-to-day, and more than one has noted it tows more easily than its size suggests. The loft adds yet another sleeping or hangout zone, which is part of why this floor plan can comfortably sleep 13. One thing worth knowing going in: RV Insider reviews and owner accounts both flag factory fit-and-finish as variable, so a thorough pre-delivery inspection is a smart move with the Sierra 3660MB.
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Fifth wheel trailers that share features with the Sierra 3660MB, like front bedroom, kitchen island and loft.
