DS3 is still in nappies at night (he likes nappies better than pull ups or PJ pants), and even so, we often need to strip the bed.
DS1 is 9, nearly 10 and is only just dry at night (with the occasional accident, even now). He refused to wear any type of pull Up/nappy from the age of around 4, so I've had long years of experience dealing with wet beds!
We lifted DS1 every night until about a year ago. He still wet the bed often, even with the lifting, but it seemed to happen in the morning, so lifting at least saved us from being woken up.
Because DS3 has always used nappies, we've not really used lifting with him. He's a very light sleeper, and when we tried lifted him, he woke up, and became very distressed, so we stopped and kept using nappies.
It may be useful for you to hear my bed-saving method! I put layers of protection on DS1's mattress, and I've never had any leak-through!
1.Waterproof mattress protector that fits round the mattress like a fitted sheet.
- Washable or disposable bed mat
- fitted sheet
- Another washable bed mat
- A cot-bed sized sheet placed across the mattress, to cover the bed mat, tucking in at the sides.
Usually, it's just the cot sheet and the mat underneath that needs changing, so it's not that bad for washing. If they wake in the night, the draw sheet and mat can just be whipped off, and the child tucked back into bed without any fuss, hopefully to go back to sleep! If a disaster happens, I can unpeel the layers, but as I say it's never managed to get through all 3 waterproof layers.
I also have some lovely thin but very warm duvets from Lidl, that wash beautifully and dry very quickly, because they were cheap, I got a couple, so there's always a spare just in case.
Thankfully, my middle child decided one day at the age of about 2 and a bit 'I think I'll wee on the toilet, Mummy', and that was that. he never wore another nappy again, day or night, and has never wet the bed
. Of course, he's my best one 
As you can tell, "Bed Wetting in General and Mattress Protection in Particular" is my Mastermind subject. I'm thinking of doing a PHD in it (how the mighty have fallen...sigh...)