Simplify the following text for a Grade 5 native English-speaking person.
Original: It was impossible to cross here , but after a few days a better place was found , and constructing the rough frame of a boat , they managed to get across .
Simplified: It was impossible to cross here ( near the site of Albury ) , but after a few days they found a better place . They built the rough frame of a boat and managed to get across .