I have many thoughts, but one keeps popping into my head.
If you have a deckie or two, make sure they know exactly how to assist you launch and retrieve. If your deckie is your wife or GF, help and encourage them to participate in this, don't just " do it all yourself ".
An experience I had once when returning to Manly Boat Harbour and with the %$#@#$$ facilities there, I actually radio'd the Coast Guard and asked if they could back my trailer down so I could drive my boat on as my deckie was " incapacitated ". I pulled up to their pontoon, passed over the car keys and they did the rest..... this was because I was returning at peak hour ( which I normally do not do ) and attempting to leave boat near ramp ( no sand or gravel, just concrete wall ) and get my car to retrieve was going to end in tears.
I like the ' Car Park " practice idea ,
I also do not hang around the pontoon when launching & retrieving , I motor around in circles away a bit until my deckies are ready to board or my trailer is in the water ready to accept my boat ( drive on ) .
Patience is what's needed in large quantities and always remember,
there is no cure for stupidity.
cheers LP