Senior discount,  Dark Skies, Observatory, Tallest Dune in N.A., definitely worth a night or two.  

Our son was stationed at Mountain Home AFB and deployed in the Iraqi war, Enduring Freedom.   We did not have the chance to visit as a result.  While in Idaho, we swung by the base and then headed to Bruneau Dunes SP at his recommendation.  It was not what we expected.   I won’t lie.   It’s a desert folks … well, more accurate,  high plains.  But what a cool place.  The sites are basic & not a lot of shade to be found.  But the bathhouse is emaculate.    Great showers to wash off the sand from climbing the dunes.  Even if you aren’t staying at the campground,  you can shower for $3.  If you are interested in astronomy or astronomy photography,  this is a great place.   The observatory wasn’t open the day we were there.  I didn’t get meet the host, but heard great things. The dump station is large.  AT&T service, spotty.