We got our first senior pass about 8 years ago at Lake Powell, which is a National Recreation Area, but allows the use of the senior pass. My wife got one about three years later, yeh she's a lot younger than I, and when we go to the gates, she usually pulls hers out along with her driver's license to give to the attendant as she prefers I pay attention to my driving. Has worked every time at the gates. And, they are not "good" for seven days, they are "good" 365 days a year, 24/7. We usually spend about three weeks in and around Grand Teton National Park and this senior pass has saved us a ton of money, $20 or so every time we enter the first time, and about $12 a night camping, so for 21 days using the senior pass this past year we saved a bit over $300 on entrance and camping fees. However, we didn't use the RV park with FHU as they don't give much, if any, discount for the senior pass. Best bargain ever received from Uncle Sam, bar none.