I have named my kit a HELP bag, which stands for:
The other acronyms listed in the title (for anyone not already familiar with them: BOB is for Bug Out Bag, GOOD is Get Out Of Dodge. The other names are pretty self explanatory.
I live in an urban environment, and in the southwest. There are no days where the temperature drops below freezing. I live in a very moderate climate and so in survival terms, the need for heat and serious shelter from the elements do not rise to the level of "survival" here, and so they are not a major consideration in what I chose to put into my pack. I have some very lightweight items that will assist me with shelter, but would hardly be considered "durable" for long term use. I'm looking at it as a very short term solution for the purposes of this particular pack. I'm not ever going to be at risk of freezing to death or even a serious risk of rain.
There is nowhere around me that I could hunt for food, so I have zero need for fishing equipment or hunting supplies. I'll have to muddle through with the items in my pack for food if it comes to that.
This bag is more or less something to grab if somehow the crap hits the fan somewhere and I need some bare bones survival tools, and is designed to last more or less 3 days, for 2 people.
In my preparations, my intention is to be able to incorporate each smaller kit into the next larger one, which allows me to not have to duplicate every item multiple times for different packs, but some items are duplicated as each larger pack allows for better, larger or more durable items to be included.