想8月去黄石。但在national Park Lodgings上找到的房间点进去总是这样的信息：
Thank you for choosing to stay at Yellowstone National Park
The offer you're trying to access GVSUM3 is no longer available or
invalid.
Reasons for getting this page.
1. The offer is invalid. (does not exist etc.)
2. The offer is inactive.
3. The arrival date selected is after the end date of the offer.
4. The end date of the offer is before todays date.
5. The page attempted cannot be accessed directly.
