As long as they don't get much below 40 or over 90 degrees for too long and don't dry out a 5 hour bus ride will be no problem. Remember that many people mail order worms and they are shipped overnight and the worms do fine.

When I purchased worms they came in an unsealed plastic baggy in a cardboard box and it was an hour drive home then they stayed in there for a few days while I get their composter set up. I asked the worm farmed to throw in a little of their bedding when I purchased just to give them something to munch on while they waiting.

I want to see that movie.

A reason to go 5 hours would be to see his setup and chat.
To save yourself the ride and the time, capture indiginious composting worms. They may be exactly what the worm farmer is going to sell. Dig in your compost after some especially juicy items have been in it for about a week. Right under it you may find a fist size ball of worms. Use this to start your setup. Need more? The compost heap probably has a whole new batch ready for you every day.

I moved half way across the country in June. My flow thru worm barrel spent like 5 days on the back of a truck with the rest of my stuff. When they showed up at my door they seemed to be unaffected by the trip.