回复：not yet

Suggest you plug in your tentative dates first to see the availability of each location, if you have not done that yet. Check out their cancellation policy and decide if you want to make reservation first and then decide later whether you want to keep them.

When I tried to book rooms at Grand Canyon in March for May stay, several dates I want were not available. I made a backup reservation but later I found better choices outside park, so I cancelled it.