Re: RMNP first timer
I love the Fly Fishing RMNP book.
Fern Lake trail following the Big T is always good. Bring the 4wt and some copper John's , San Juan worms and Hot Wire Prince nymphs that time of year. You can also do some drive by fishing right in Moraine and Glacier creek near by.
The roaring river is also a good option.
"The fish you're gonna find up here, you're gonna find; Rainbow,Cuttbow,CuttBrowns,Brownbows,RainBrowns,
CuttyRainbrowns, Pike ,Perch"
"Snap it" Hank Patterson