We didnt have a problem whatsoever either. Bear canisters are bulky and a pain to carry, but they sure serve a great purpose! In addition to a bear can, we also use an Ursack. It's not approved at all NPs, but the Inyo allows it, as do most NFs. Since I have a small pack, the Ursack allows me to carry the toiletries, garbage, snacks etc while my hubby carries our food items that we don't want crushed. After several backpacks into bear country...knock on wood, we've never had a problem. The trick is correctly sealing the bag.
At Langley, make lake #4 your base camp. Lots of great spots and you can easily watch and talk with hikers coming down OAP. It's a short hike up to lake #4 from the TH. If you fish, don't forget your rod!