I’ve never seen it as high as it was last week! Never...
That said, lots of variables that go into predicting the JD flow. Temperature being number one. It’s been a pretty cool spring so far. I’d think you’d be fine that week in June, but definitely towards the end of it.
Looks at water levels two years for that time frame. Snow pack wasn’t as good as it is now. We floated Service Creek to the house, about a mile upstream of Twickenham, around the Fourth of July that year at abput 800 cfs. Water dropped like a rock after that week.