No doubt some of the caravan members will weigh the odds and decide they have a better chance of sneaking over illegally. But if even a few thousand were to try it, they would pose no unusual challenge to the Border Patrol — which apprehended nearly 6,000 people every week last year crossing from Mexico. The administration has also announced it will deploy 5,000 troops to the border as an extra safeguard, on top of 2,000 National Guard forces sent earlier.