Can I quit after every six months to travel?

Yes you can

 

If its a decent job explain your reasons and request a leave of absence so you have a decent job to return to. If you are worth a pinch your current employer may agree. I know I can however benefits will come out of pocket or must be paid up upon return to work.

 

Also, gone for 6 months they may require a refresher course upon returning.

 

Probably look at Temp Services. Not too many companies are gonna be interested in you if you have multiple employers and gaps in your record.

 

Call and ask companies if you'll be able to take leave like jazz said.
I know some companies have requirements for leave. Like the longest you can be gone is 3, 6, 9 or whatever months they decide. Ask about that too.
Tell them your plans. I don't see why they would care if they have the fleet capacity to deal with truck turnover.


Knight, Roehl, and even Schneider I think all have part time/casual OTR fleets where you can basically set your own schedule on the terms that you slip seat the truck when you're gone for more than a couple days.

 

Look at companies that have seasonal work. When work slows down take a leave of absence. Might work out well for you and the company.

 

That's the best way; work for temp services that hire cdl drivers. This way you're not job hopping either because you can work for a temp service and drive for several companies, but only show one employer, the temp service.

 

Many places have much higher demand during certain seasons. Plenty of propane driver positions open up in the northern states during the fall and winter seasons, for example.