A bug-out kit is a 48 to 72-hour kit. In other words, it is a disaster supplies kit. As such, it must contain enough items and supplies to get you through the next 24 to 72 hours.
These kits can be elaborate or simple. You will need to decide on what to put into them.
You also have to prepare one for each member of the family, including any pets who will be bugging out with you. Essentially, there are two specific types of bug-out kits: One that is general in nature with items the entire family can utilize and one that is person-specific. In the latter case, a bug-out kit will contain basic items you and each family member will need during an emergency event such as a wildfire.