I wouldn't let other people showing up or not showing up in shape dictate whether or not you want to compete. Worry about the things you can control--you can't control who shows up or doesn't come in shredded.
For me, it's not about a trophy--it's about beating my last package, learning (more) about myself through a prep (especially with kids, having a business, sports, etc), the struggle, the light at the end of the tunnel, the relief when show day comes (and passes), the meal after the show, and then missing that whole process.
I get and respect wanting to compete (against others with like minds), but you know, someone who doesn't come in shredded may have lost 50+ lbs just to get to that point (and they are happy with that)...or that one person just beat some disease...or...(fill-in-the-blank)...and that's a bucket list item for that person..
Bring your best and have fun...at 40+, I can't imagine a plastic trophy can mean all that much...regardless of who shows up.
Good luck...
-s