Simplify the following text for a Grade 5 native English-speaking person.
Original: A day or two later , in broken hilly country full of water-courses , they had great difficulty in finding a road for the loaded carts , deciding on 27 October to abandon them .
Simplified: A day or two later , in rough hilly country , they had great difficulty in finding a path for the carts . On October 27 they decided to leave them behind .