High quality gouache is essentially watercolor paints made opaque through pigment load. Similar to watercolors, you can buy or make “pans” of dried colors and rehydrate them for use. They will handle a little differently than fresh liquid gouache, but that is the tradeoff for not needing to bring a dozen tubes.
The binder and ingredients used makes a difference with how well the gouache handles the drying/rehydration process. Some brands will flake and fall apart if dried in a pan, others might crack but will stay together. From my research M. Graham seems to handle it the best thanks to their use of honey as a binder and thus they are who I use.
The one exception is alizarin crimson, as M. Graham’s gouache seems to use the original fugitive pigment instead of the “permanent” variation.
My palette is an expanded split complementary scheme with two pots of white, one for blending with other colors and the other that only gets touched by a clean brush. By having a warm & cool version of each primary, along with earths and greens, I can readily mimic nature in all her glory and brilliance.