I am quite ignorant on these specifics but wouldn't it be feasable to basically have them in a greenhouse environment, heated, in the North pole area, where I believe there was some form of IceWater found..
If possible to even melt some of that, and let that cascade the effect ?
https://www.esa.int/Science_Exploration/Space_Science/Mars_E...
That would work only for a base located at the North pole.
If you want to explore other regions, or to set there a base, for instance for extracting some useful minerals, all the water will have to be transported from the poles, unless some quantities of ice will be discovered underground elsewhere (or of hydrated rocks, which can produce water when heated enough).
Unless enough ice or hydrated rocks are discovered underground elsewhere, the amount of ice from the poles will sustain only a small human population.