Waders aren't mandatory in many locations, however. I've found that fishing the lakes' inlets and outlets is most productive. A size 16 or 18 dry fly such as a light cahill, mosquito, black ant, wulff, or caddis, is the best to use. These same lakes also provide the occassional lunker. The streams that flow through the backcountry are, for the most part, narrow and marshy.
Waders are necessary to fish the streams in spots.
Brook trout are thick in the streams, but flycasting can be tricky due to the abundance of reeds, willow, and marsh in most stream sections.