Different Tyveks. Preferences?

Skip the Therma/Drain/Stucco/Commercial stuff. They're specialized variants which you don't need and won't work as well.

Homewrap is pretty heavy, but the lighter versions can let water through. Once you wash it a few times it'll soften up (and REALLY quiet down) but it can still be pretty slick to walk on.

Most of the Tyvek suits are made for splash/dust resistance so they'll weep more than Homewrap. This is the stuff you'll find at kite-stores and kite-suppliers but not at Home Depot/Lowes.

The lighter versions make better stuffsacks/clothes; the Homewrap makes better shelters/floors/bivvies (IMHO).

Of course, really, you can skip Tyvek and go straight to the window shrink-wrap. Tyvek's far more durable, but heavier, so it really may be the best choice for scouts. :)

-mox