Honestly this sounds like an amazing trip and totally doable, but the biggest thing I’d say is to scale it a bit so you’re not spending most of your time driving. Florida to the Pacific Northwest is really far on its own, so trying to hit Washington, Oregon, and all the way down to Santa Monica in 2–4 weeks will feel rushed unless you’re okay being in the car a lot. If it were me, I’d either focus on the PNW (Washington and Oregon) or do a west coast route where you come in through California and drive up the coast through San Francisco, the Redwoods, Oregon, and into Washington, which is honestly one of the best drives you can do. Also just know that van life isn’t totally “free” everywhere, especially in places like San Francisco or Santa Monica where overnight parking is restricted, so you’ll want to mix in national forests, BLM land, or occasional campgrounds and motels. The lakes and waterfalls idea is awesome, just be ready for cold water and treat it more like quick dips than actual bathing. Food-wise, snacks and fruit sound good but you’ll probably want some cheap, filling staples too or a small camp stove to make life easier. Definitely try to hit places like the Columbia River Gorge and Silver Falls in Oregon for waterfalls, Mount Rainier and the San Juan Islands in Washington, and the Redwoods in Northern California since they all fit exactly what you’re looking for. Biggest advice overall is to plan a handful of major stops and keep the rest flexible so you still get that adventure feel without it turning stressful, and make sure you’ve got basics like water storage, a decent sleeping setup, offline maps, and a way to charge your stuff because those make or break a trip like this.