By Jessica Ravitz, CNN
March 6, 2011 10:42 a.m. EST
From Jacksonville to Tampa, Florida (CNN) -- If you thought you had less than three perfectly healthy months to live, what would you do? Would you travel? Spend time with loved ones? Appreciate the joy life has given you?
Or would you ditch your kids and grandkids, join strangers in a caravan of RVs and travel the country warning people about the end of the world?
If you're Sheila Jonas, that's exactly what you'd do.
"This is so serious, I can't believe I'm here," says Jonas, who's been on the road since fall. Like her cohorts, she's "in it 'til the end," which she believes is coming in May.
She won't talk about her past because, "There is no other story. ... We are to warn the people. Nothing else matters."
Such faith and concern drove her and nine others, all loyal listeners of the Christian broadcasting ministry Family Radio, to join the radio station's first "Project Caravan" team.
Learn about other doomsdays that have come and gone
They walked away from work, families and communities in places as far-flung as California, Kansas, Utah and New Jersey. Among them are an electrician, a TV satellite dish installer, a former chef, an international IT consultant and a man who had worked with the developmentally disabled.
Gallery: Doomsdays throughout time
They gave away cars, pets, music collections and more to relatives, friends and neighbors. Some items they kicked to the curb. In homes that weren't emptied, clothes are still hanging in closets, and dishes, books and furniture -- including one man's antique collection -- are gathering dust. Unless, of course, they've been claimed by others. If you believe it's all going to be over soon, why would it matter if you close the front door, much less lock it, when you walk away?
It's a mid-winter morning in Jacksonville, Florida, when CNN joins this faithful caravan. The "ambassadors," as they call themselves, are easy to spot. They are the 10 people milling about in an RV park drawing stares, eye rolls, under-the-breath mutters and, at times, words of support.
They're wearing sweatshirts and other clothing announcing the "Awesome News," that Judgment Day is coming on May 21. On that day, people who will be saved will be raptured up to heaven. The rest will endure exactly 153 days of death and horror before the world ends on October 21. That message is splashed across their five sleek, vinyl-wrapped RVs, bearing this promise: "The Bible guarantees it!"
Maneuvering onto the road with such a serious statement takes time and patience.
CONTINUED WITH VIDEO GOODNESS!