hey everyone!

Last few days I have been down with a cold so head just isn't working well for puzzling over gimp, so I have been thinking over different ideas for races of people; their behaviors / traditions and why they have them. There is an idea for a people I would love to use one day, but there is something I am stuck on...I would like to have something that dictates where they are during the year, something that forces them to be nomadic. Maybe they gather and shelter in cycles? The idea of a situation that has tides over a very large area, exposing rock pools for foraging fits the feel, but the time frame is too short.
So, if anything comes to mind that i could research or such, that would be fantastic! I'm afraid my stuffy head is failing me on ideas

Thanks for your time, back to lurking for me.
Alvary