Hello. Can you advise how to easily take a baby, 4 months old, into th…

Hello. Can you advise how to easily take a baby, 4 months old, into the mountains? We're going to visit our in-laws in Almaty, to breathe fresh mountain air. We'll drive there by car, but we still have to walk a little bit to the meadow. A stroller is definitely out of the question. Now we're thinking about how. If we buy a child carrier kangaroo, would it be harmful to him? We also want to go to the beach on Cape Chagan, what should we know to not harm the baby on the beach? Sunscreen, umbrella will be.