Hello Helen
The only advice that I can give about getting your son dry at night is what I did for both of mine (and probably most other parents do as well at first).
Get one of those nice plastic covers for the mattress (the type that make you sweat horribly but protect your bed).
Be mindful of the amount of drinks just before bedtime.
Make him go to the toilet just before going to bed.
Just before you go to bed, lift him out and sit him on the toilet ( or get him to stand if thats better) and he will probably have a wee whilst being half asleep. Try not to speak to him too much - you don't want to wake him too much.
Tuck him back up to bed and hopefully he may go through. Have plenty of spare bedding available -just in case of accidents in the night.
But having 4 children...... you probably know all this already!
Good Luck.
