Depending on where you live in BC, a BOL might be your own house, or you might expect to travel hundreds of km to get to a place that is reasonably safe from whatever chaos has ensued, from whatever disaster has occurred.

When I look at the most likely scenarios, and keeping in mind that one needs to prepare for the unexpected, there are a number of considerations that must be addressed.

Infrastructure - Some events like an economic collapse give some sort of warning, and do not cause immediate panic and chaos, so integrity of infrastructure is not a critical concern. But in an event such as the big earthquake that is supposed to hit Vancouver Island and the Lower Mainland, there is the strong potential that roads and bridges will be severely damaged, and if not shut down by government for safety reasons, will be clogged with thousands attempting to evacuate. Those on the other sides of bridges could quickly find they are isolated and fending for themselves, and bugging in will probably be their best option, while others helplessly wait for federal aid to arrive. For those able to travel, if conditions such as winter roads were encountered, would you be hindered from getting to your desired location.

Transportation - Is your vehicle roadworthy to travel as far as you need it to in order to get you to your BOL, or further should you find it has been compromised? The average person probably has less than a half of tank of gas in their tank, particularly with the cost of gas these days, and in any disaster gas pumps are lined up assuming they will be functioning at all. While impossible to prepare for all mechanical failures, would you be stranded if you got 2 flat tires, or a serpentine belt broke?
Do you possibly have an alternate form of transportation such as a motorcycle, quad, or even a bicycle?

Distance - In a situation where you cannot use your vehicle for any reason, and if you do not have an alternative motorized form of transportation, could you reasonably walk or pedal to your BOL? You could have the best BOL in the world, but if you can't get there it will be useless to you. If you can't hike there with your BOB, it might be time to reconsider its' location, or your means of getting there.

Network - While having a BOL is great, is it in a place where you know anyone or will have other meeting you at? There is strength in numbers, and when others have what you want, you may find yourself needing to defend it. You may find yourself needing things you didn't anticipate for a number of reasons. Are you going to be stuck as a lone wolf, or are you going to have people you can go to, or who can come to you when they need assistance? You may also find your BOL compromised, in which case having local contacts could be of great benefit to you.

Site Readiness - Is your BOL just a location in the mountains, a cabin you own, or is it a family member or friend who has a safe location? If you are just heading to a general area in the mountains, your need to carry essential supplies will be higher than those with a location already set up. Is there power, a ready fuel supply, do you food stores, a water source etc... What are the materials readily available to build shelter, is the area cleared for agriculture, etc...

Plan B - There is the possibility that you will not be able to make it to your BOL, it will be compromised when you get there, etc... You need to have a back-up plan.

Here in BC there is no shortage of great BOLs, with plentiful resources, that could support you and your family.
In a situation where you need to get there, make sure that you are as prepared as you can be.

Put together a VEDC.
Make sure you have mapped routes, and alternates to your BOL.
Make sure you have enough gas at all times, consider half the new empty.
Have a Plan B.