advice: Colorado River in Grand Canyon

Fishers:

I'm going down into the Grand Canyon in a week and a half. In the
Nankoweap Creek area.

We're going for 8 days, I'm traveling as light as possible. That means
no net, no waders, 1 rod, etc.

Anyone have any tips or experiences they'd like to share? In
particular, what flies would I most like to have along in late
March/early April?

Thanks, as always.

- Bryan

ps. Anyone been to the 'Juan lately? I may get to try the Rio Grande
Gorge tomorrow/Sunday.