Must admit; I always float mine on, as I have bunks .
In fact when I had the trailer built, the shop were quite amused at the idea of fitting rollers on such as small boat trailer.
"Too many things to break/corrode and replace" as the owner said.
So I went with the simple bunks and have never had an issue.
We do have nice ramps though that allow you to back down safely at a gentle gradient.
The best part about the trailer though is the "overbuilt" guide on poles.Really strongly built and very functional. I adjusted them so they are a tight fit against the rubbing strakes. (They are sleeved with poly pipe so they spin) On approach as long as you get the bow lined up in between,you are in business. Even in a strong crosswind,if neccessary you can grab the poles and pull her into line with the bunks.
Generaly I just idle in, and once the bow enter the poles;cut the engine and move to the bow ready to get out and attach the strap.As the hull touches the bunks further forward, it slows the forward motion and usually comes to a dead stop just in front of the winch.
Seen a lot of solo people on ramps having issues when the wind blows them sideways . Seems such a simple fix to have good guide poles
Certainly saves a whole lot of stress!