ualpow wrote:Any pointers on what to bring . . .
As little as you can get away with.
ualpow wrote:. . . or leave behind?
Everything you don't bring, which should be almost everything you own.
The big exceptions are, of course, all required safety equipment, ID for each person, personal effects (not a steamer trunk)
including shower supplies, with flip-flops or shower shoes for public marina showers and swim trunks/suits plus towels for the kids, and super important stuff like a coffee pot that you can use on the boat with filters/coffee/cups, electric if at a dock if you prefer, or fuel if not or for future-proofing your supplies. Paper goods for eating (disposable), paper towel for cleaning (disposable), head supplies (TP and such), and so on. Cooler with food and ice (you won't be able to refreeze anything, so might as well start and finish with ice), some way of cooking if that's the plan (but restaurants don't require such preparation, again, as long as you know you'll have access to them), etc.
And critical boat things like dock lines, boat hook, charts, nav equipment, a working compass, and so on. Bug screens and an electric fan (battery if not at a dock with power) or two so you can sleep at night. A 12VDC or 120VAC TV with rabbit ears if you or the kids need some toob before bed (but this is a great opportunity to unplug).
But for a first trip, I'd keep it as light as possible. You'll learn (fast) what works and what doesn't, what you needed and what you didn't, and so on.
I've never overnighted on this boat, but have plenty of times on a larger boat, and room was at a premium on a larger boat, so do keep in mind that even for just a weekend, the boat will get crowded fast with 'supplies', so don't bring anything you don't absolutely need and can't find locally at your destination.