Even on high activity, monsters only spawn in dark enough space, so our seraphs are pretty safe from bowtorn in daylight(surface drifters are not that deadly). So yes, I explore on day one, though I do change the setting when I want a peaceful time period with new world gen setting.
Base location though, I prefer a perma first base as a sort of industrial center, with all my forge and smith together. With that in mind, I would only settle in a location near clay, peat, surf copper, fresh water, stone for lime and bauxite, with at least three of these. It is easier to move my ass at first, than move my base later