JMT Through hike. Bear Canister capasity 5 day max.

Going to hike JMT North to south in August. Last re-supply is Muir Ranch, from there its about 10 days to Mt Whitney. Since bear canisters hold maybe a max of 5 days worth of food what are hikers doing with the extra food that won't fit into bear canister. NPS requires that we all carry canisters, but are people counter balancing extra food, or are there many fewer bears in the southern part of the JMT. Help what to do.