Welcome, Ashley! The new Scamp Lite would be a great match with your Maverick. It’s not your only option. An older, fairly basic 13’er will weigh close to what the new Lite model weighs. That would give you a full galley and a front window, but not the new composite floor and big bed (except a few 2014+ units). Personally I like the
propane furnace in ours for off-season camping.
The big bed is a big deal in the Scamp world unless you’re going solo. The standard dinette bed is only 44” wide and very tight for two adults. The “big bed” is 54” wide, true full size. The Lite model has it.
Fiberglass itself is impervious to wet and cold. The main thing that damages fiberglass is UV radiation from sun exposure, which can be prevented with regular waxing and/or covered storage. One thing to keep an eye on in the snow belt is the painted steel frame, which rusts pretty easily. Avoid driving on salted roads, and wash off the underside promptly when you do. At some point it will probably benefit from a rust treatment (POR-15). We live in a snowy area of Arizona and deal with salted roads.
In damp climates take steps to prevent mold and mildew on the inside when in storage with ventilation, chemical desiccants, and/or an electric dehumidifier. Fiberglass egg trailers are generally tighter than the average RV, but
windows, vents, and other shell penetrations still require occasional maintenance to keep
leaks at bay.
Best wishes finding your little egg!