The original trailer was too light for beach work and was bent and damaged a number of times whilst retrieving the boat. The tilt on the trailer opened too much and so resulted in a lot of banana-shaped roller pins and chewed out rollers. The angle of the tilt was too steep for retrieving and what happened was all the weight was taken on one roller at a time until almost loaded. This made retrieving easier as all the rollers were taking the expected weight, although I suspect there was more strain on the trailer. It lasted a few years, but something more heavy duty was clearly needed and remedied by a new trailer.
Techniques Deciding whether the beach is too rough to launch is tricky for newcomers.
The waves may look little from the shore, but they have a habit of becoming much bigger once you're amongst them. Again, do what the locals do. If they don't go, you shouldn't either. Take the time to watch wave patterns. Look for gutters, or rips and plan the line of attack well before hitting the water.