Werner Schmidt wrote:

NACK.

Our club owns self-built (in late 60s and early 70s) trailers for our
K-6, K-8, and K-13 without any suspension except the air in the tires.
None of them is bouncing "like crazy over any kind of rough road", and
none of our planes was "beat to pieces" as well.

Interesting. But that would be a deal breaker for me when looking to
purchase a used glider.

Regards,

-Doug