Bryce Canyon's higher altitude brings cooler weather and more frequent snow in the winter, which only accentuates the beauty of the landscape. Carry water, rain gear and warm outerwear. If you're at the parks during a busy time, adjust your schedule to take advantage of the great light and absence of visitors at sunrise and sunset. Many park visitor centers, including those at Bryce and Zion, distribute pamphlets with advice on what, where and when to photograph. These can be valuable for planning your day.
Concessionaires sell film in around the parks, but the choice is very limited and prices are high.
Always bring more film than you think you'll need. If you'd like the advice and company of fellow photographers, consider a photo tour. Itineraries are planned to hit the right spots at the right time, which removes some of the guesswork.