Tiger Mike,
I would do the same if I supported my boat on its hulls when on the trailer. There is not much weight on the rear when on the trailer still I wouldn' let them sit on rollers while trailering.
At the very least I'd slip some pads between the hulls and rollers.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!