Haha yes, the old Bernie was MUCH different than the Bernie we know, today
In The old Pocalypse, Bernie was meant to be alone in the Base - no Jess and no Harry. The Base's original function was to house Bernie's vast marijuana farms (like in the underground farm in the movie "Pineapple Express"). Being a successful marijuana dealer before The Pocalypse, Bernie had accumulated tons of money to build his dream bachelor pad, within the Base. When The Pocalypse hit, Bernie had the perfect shelter
Bernie was also meant to be a neurotic coward who could only face zombies if he was high. So, the marijuana would have acted as a tool to make Bernie more into the brave, self-less person we know today, albeit a bit more stoned.
I dropped this idea when I dropped the original comic idea. Bernie somehow became more of a technically-gifted, level-headed hero than a bumbling stoner. Then, I threw in a sister and a robot