.........

Terwijl ik reinigde schoonmaakte (technically reinigen is a correct word but I don't think anyone uses it in this case), aten de mensen haar hun brood. Zij zijn slecht gehumeurd. (this is the present tense while the rest is in past tense, so you might want to say Zij waren slechtgehumeurd) Zelfs de aardigsten emmerden. (emmerden is really old fasioned, I don't know anyone who would say that. You could say "mopperden" or "zeurden") 
De wind blies altijd sterker buiten. (This sentence is correct but it feels a bit out of context because you say, the wind always blows stronger outside, I don't get the "always") De boot schommelde.
De oude Rene zei (is there also a young Rene in this scene? Otherwise you don't really use "oude" like this I think... You could say "De oude man zei"):
We drinken nog wat koffie en dan gaan we om de het visnet er uit halen. te uithalen.

Well done!