What size boat?
So many 70s early 80s boats still have original trailers in near original condition... often out lasting poorly looked after boats.
And Everything Dave says above..
Keel rollers with
tilt is the ideal. You will hardly ever use the tilt unless on a very
very flat ramp or beach.. which is the ideal trailer.
Mine is aset
with a small chain to limit how far it tilts.. about 2 top 3" at the
hitch end. Any more and it can be hard work pulling a 1000 ish kg (net)
up steep slope.
A 18v 1.5AH drill will do it with a little help fast than yopu can turn.
We
drop off and load faster than most, but its hard to beat
organised
guys with a wobbly.. We where out with acquaintances couple days ago, 2x
7m boats and ours Drop off the tow vechilce driver.. busy ramp.
They just backed down, huge side current (Te toro) they just drove up and on , hooked up drove out.
Many
ramps do not permit this espec if the pad is short. Trailer wheels
dropping in to a huge hole at the end can mess up everything from guards
to not getting out.
The secret to keel rollers with strong side
winds or current is do not go deep.tHE BOW MUST SIT ON AND BE PULLED UP
OVER THE END centering roller. Do not go deep thinking it will be quicker or easier unless perfect wind/ current condtions. If you do not the stern will swing
against the guide poles, and the bow doesnt line up/ runs off the
rollers 1/2 way up.
Get that right and retrieve is quick almost
as quick within 15/30 secs of a wobbly drive on set up, short winch...
difference being the winch time.
Total winching time on our 1000 to 1100kg ish is around 60secs with a drill
Another
trick for lurching (including solo) and roller bit sticky which they
will do every now and then) is a double bungy painter on the bollard to
trailer winch pole that is stretched just enough to hold the boat
against the centering roller.
If boat doesnt push .. on the very 1st
push. To the truck cab, roll back 1/2m hit the picks, boat rolls off bounces back to end of trailer.. you can also while in the cab bring the
boat in few meters more shallow if wish.