I have heard both sides: that bugging out will make you die, and bugging in will make you die. Only you and your tribe know your situation best.
There was an article on another prepper forum (wish I had saved it for now) about a group in lower Michigan who planned to bug-out on horseback. One weekend, they put their plan to the test. They were riding something like 75 miles, sixteen people in the line of march. By the end of the trek, none of the original horses were with the party, and thirteen of the sixteen riders had quit. That’s over an 80% attrition rate.
Horses adn people in poor condition. Trail riders cone into our area for recreation. Few can make over 10 to 15 miles in a day and heaven forbid doing that several days in a row. A well conditioned cow pony can do 30-50 miles a day for several days on reasonable terrain.