Bathroom waterlines plugged

[J-Rhett]

I searched a lot of content and couldn't find anything like this.  Do I have a plugged water line?  Kitchen faucet and outside shower work great on fresh water and on city water.   But the bathroom sink and toilet have barely a dribble.  Before we went out to camp the water system was ok.  After traveling just 20 miles or so the bathroom water doesn't work.  I found plastic shavings a couple of years ago in the toilet inlet filter.  I haven't checked it but that wouldn't plug the sink too.  The plastic came from when they post drilled the tank a few year ago I think.  I really don't want to make a trip to Hohenwald and back as it's about 760 miles round trip and diesel is hehehe.  I know not much about how to clean water lines inside the double hull.  How do I attack this problem?  Hints?  I won't be camping anymore this year anyway.  Rhett & Dory Hull #186 2017