Re: bunk or roller
I love my roller trailers, and I have one that is a bunk trailer, 2 are all roller, and one is roller but 3' of bunk at the end--that one also breaks.
The reason (as someone pointed out) that you see more bunk trailers now has absolutely nothing to do with which is better and everything to do with getting the sale out the door cheaper. The typical buyer doesn't buy a boat based on the trailer, and that same guy doesn't ever get to compare them, so bunks it is--unless the buyer knows trailers.
Rollers take getting used to, but comments I hear over and over, once you'er used to it, you never go back, even though you hate it at first.
it is not true that rollers are harder to get the boat on straight. Just not true. What matters is set-up, hull design to some degree, and whether it's used correctly (80% of the time meaning not in too deep. I set my bow on the first roller (the one at the far end of the trailer, sitting just below the surface of the water, or just above) and crank it up; the boat straightens itself.
It is true that some hulls should not be on rollers and some should not be on bunks due to stress while stored. That distinction has to be made at the manufacturer level--it's not a "personal preference" matter.
After years of observation, I conclude that bunks are fine for fresh water applications and should be avoided for salt water. So all you fresh water boaters who prefer bunks are 100% "right." But now that the boats are mostly sold with bunks, inexperienced salt water boaters are jumping on them, clueless to what is happening to their equipment.
Case in point--about 20 years ago I was at a seaside ramp and an inexperienced guy I was with dunked his trailer--it drew a crowd of salty spectators who shook their heads and gave the trailer 2 years. It was a rare sight indeed, for good reason. Now, I see it all the time, no one stares, but we know what's happening. And the only reason I have a drive-on bunk trailer on the seaside is because it cost $500 and is only used at the ramp, no highway, is owned by 7 people, and someone needed a replacement trailer quick. We got our three years out of it.
An exception for dunking a trailer in salt water is those who only do it a couple times a year, hose off the inside, etc. immediately. They'll do OK. But not the weekender.