Yes, I've fished Rynda but have spent much more time on the Kharlovka and East Litza. A couple of years ago, the largest fish of our week on the Litza was a 44 lb fish taken on a size 10 waked in the surface, so small flies can work. And we actually took fish on size 14 doubles on the Zolotaya. I think your sizes are good, but don't forget to include some larger sunrays. I've generally fished the 2nd week of August, will likely fish the Rynda in June next year. Not fishing it this year, leave for Montana and Oregon today. Good luck, and let us know how it goes.