more Parks require bear-proof canisters

From National Park Traveler:

Grand Teton National Park … beginning this Saturday, March 15, all backpackers camping below 10,000 feet in the park’s backcountry will be required to use approved, portable bear-proof canisters for food storage—except at certain designated backcountry campsites where food storage facilities are provided.

Although food canisters are not required for areas above 10,000 feet, proper food storage will still be compulsory in those locations. It doesn’t sound as if rangers will allow you to use the Ursack or UrsaLite food storage systems. …

Bear-Proof Food Canisters Mandatory for Most Backcountry Travel in Grand Teton National Park

Steve Sergeant of the Wildebeat is an expert. In a comment on that post:

Bear-resistant food canisters are also required in most of Sequoia/Kings-Canyon National Park as well. In addition, large areas of wilderness on Forest Service land in the Sierra Nevada also require you to use such canisters.

We explored the history and effectiveness of bear cans in a two-part edition of the WildeBeat:
The Story of Bear Cans, part 1
The Story of Bear Cans, part 2

Personally, I have learned to love my canister. I often take it on hikes even when not required. The extra weight is often worth the convenience.

This is the one I use:

Bear Vault Model BV400 Bear Can