Is the shower at the flying j open to the community? And does it cost? If so how much?

I think they're $15... Or ask a driver if they have an extra shower in their card... Most of us do..

Yes they do. $10 and they are nice and clean

Varies from location but most are 10-15. Most of the time you can catch a nice truck driver that will give you one, we tend to collect a lot of extra showers.

When my wife showered there it was $10

I think it's around $10 to $12.