Water treatment and food storage in Grand Gulch?

Headed to Grand Gulch for a 5 day trip from Kane to Bullet. Having a hard time finding answers to a couple of logistical questions like:

1. I've become a big fan of my SteriPen for cleaning water in the last few years. I've used it in lakes but nothing with heavy silt or anything really stagnant. Will I want a pump filter for the water we're likely to come across in the gulch?
2. What's the standard protocol for overnight food storage? Hanging? Bear cans?

Any help much appreciated.

Thanks!