While the counsel to attend CVW is sound and genuine, I'm sure, I'll be contrarian.
It depends. If it's one more vball match, don't sweat it. Go if it's financially no strainer. Conversely, your dd has an obligation and responsibility to her team, coach, school, and teammates. None different than what USNA will try to nurture in her. A commitment is a commitment. Didn't your coach make that fully understood before the pre-season?
CVW is a nice experience, but not earth shattering, especially if she's been there before, albeit for NASS.
She'll have plenty of CVWs ...she'll never have another senior VB season. Unless she plays for Navy.
And on that note, Navy has just made a monumental step toward becoming a national power in women's volleyball. Larry Bock, the winningest coach in volleyball history, has just been hired. He will not be satisfied with the ho-hum mediocrity of recent USNA volleyball teams. Place money on the idea that Navy'll be kicking behinds in the Pat League and becoming a national power soon.
So ...depending upon the circumstances of your team's season and your role on that team, CVW might well be totally inconsequential. Great if you can, likely making no difference beyond lending confirmation to what is already known. CVW is not the magic bullet to a guaranteed decision.