I have had a full roller trailer under my '88 model since it was new and don't have any indentions or roller marks. The key is to get plenty of rollers. Many manufactures skimp on them. I bought the best trailer I could find and then added a few more rollers just for kicks. I would recommend this trailer(Holesclaw) but they went out of business 10 years ago. The trailers were functional and most people want pretty.
I use my rollers too. I just back the trailer down near the water and roll the boat off. Then I use an electric winch to pull her back on. Never get the trailer wet. It is a little extra work but my trailer is 17 years old and has very little rust and I have never had any bearing problems. I have never seen a ramp that I could not launch at and by keeping my drive tires far from the water I have never spun a tire pulling out.
I use my rollers too. I just back the trailer down near the water and roll the boat off. Then I use an electric winch to pull her back on. Never get the trailer wet. It is a little extra work but my trailer is 17 years old and has very little rust and I have never had any bearing problems. I have never seen a ramp that I could not launch at and by keeping my drive tires far from the water I have never spun a tire pulling out.