I don’t want the millipedes that come into my house to die- what could I do?

I always have millipedes and rolly pollies in my house, especially recently since I’ve had so much rain. When I see them I always take them back on my porch where they won’t get washed out but also won’t die inside. I still always find dead ones and I wanted to know if there’s something I could do to help them not starve or dehydrate before I find them. Do I leave out a little water or something? Or is there nothing to really do?