Tents can always be tied off to big rocks. You might have to move a rock or two to get the right setup. Tying to rocks is a good idea anyway, since wind gusts can blow a free-standing tent away while you are out hiking.
Canisters: I don't think they are "required"; bears don't go up that way. But there are always little critters and marmots. They can rip into packs and tents. The canister gives you peace of mind.
