Grab all the loot I can find and shack up somewhere off the beaten path. There's very little chance I realize that it's just forumers left as checking to see if the forums are still active is low on the priority list if people start disappearing. The only person I'd actually have any contact with at that point would be Taciturn, so there are three possibilities:
1. We strike out together in a quest to make a decent life.
2. He and I part ways in peace.
3. One of us stabs the other in the gut with a serrated knife.
Realistically speaking, I'd want to get as far away from all the untended nuclear reactors as possible. I'd grab myself a nice big truck, pack it full of food, water, other supplies, guns, and ammo, and head to somewhere with a decent year round climate and a good library. There I'd hoard all the supplies possible and attempt to get power and water and all that.