We stayed for 10 days at Yakima RV Park, and after a slightly rough first night, most of them were just fine.
Overall, as RV parks go, it's pretty quiet and peaceful most of the time. Occasionally loud trucks go by on the nearby street, but we slept well and comfortably while we were there. The office seems to be closed pretty frequently, but when there was someone there they were friendly and helpful. There are rest rooms, showers, and even a pool available, and these were kept clean and well maintained.
The first night, the door to the rest rooms and showers was locked (as expected), and the provided code was not opening it (NOT expected). By the next day (and for the remainder of our stay) the door opened just fine. The manager on-duty said that sometimes the door sticks - luckily it didn't happen again during our time there.
Other than that first night it was an easy and uneventful 10 days in Yakima, and we appreciated it.