Be aware that you can and most likely will encounter all manner of wildlife, from bears to elk to mountain goats. Take the usual precautions you would while travelling in a wilderness area, and give any animals you encounter a wide berth. Travel in groups if at all possible, make lots of noise, etc. Most dangerous animals such as bears will avoid you if they hear or smell you coming.
fees/permits
All passes and permits can be purchased at the Parks Office when entering the park.
Anyone stopping in the park will require a parks pass. Daily fees are $8.90/adult, $7.65/senior, $4.45/youth and $17.80/family. An annual pass is valid in 27 of the Canadian National Parks. Annual passses are $62.40/adult, $53.50/senior, $31.70/youth and $123.80/family. Generally if you plan on spending at least a week touring the parks it is better to purchase an annual pass.
A fishing permit, valid in Banff, Jasper, Kootenay, and Yoho, will cost $9.90 daily or $34.65 annually.
Backcountry passes cost $9.90 overnight or $69.35 seasonally. Grazing permits are $1.70 per horse per day, or $21.75 per month.