My concern with a bug out trailer would be if you had no specific destination to go to you would be caught up in the masses trying to flee whatever situation had arisen. If you reach an area where the government has control you run the risk of being forced to abandon your gear or have it confiscated for the 'common good' and used to support all those who did not take precautions. In an area where my location was not a risk factor (no forest fires or tsunamis) I think hunkering down in a familiar space would be better than joining the panicked masses.