Can get a round trip ticket, and use it to come back in the next week???? How long is it good FOR ???

Yes. Although you need to know exact dates of departure on leaving and returning. Your ticket will only be good for those dates and times.

Yep just set the dates and good to go

Definitely, go on the Greyhound website and pick out your dates and search for the best bang for your buck. Also watch those hefty layovers and watch for weather when traveling.

Aw yea:), you can:).