Henry's Fork Box Canyon Advise

[Belasko]

I'm headed for Island Park next Tuesday w/ my aunt and brother in law and plan to float box canyon from IP dam through Harriman. I was hoping for some current advise on what is working and if anyone has a go-to fly or something. I've been told rubber legs, zebra nymphs, PMD's and rusty spinners so far. Also has anyone seen any hoppers or beetles producing up there yet? Any help would be greatly appreciated. PM's would be fine as well. Thanks in advance.
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