I am following this @cooper82 as we are just behind you.
My eldest cracked it when she was 4 (can't remember exactly when) but all it took in the end was taking her nappy off and she got up when she needed the toilet and didn't have an accident til about 1.5 years later on a night that she was particularly tired. We had tried 6 months earlier and she was absolutely soaked and slept right through, so for her it was just a bit more time that was needed.
We are now trying to get my nearly 5 year old dry. We have done several attempts of 2-3 nights with no nappy over the last year, last week we tried a full week.
On some nights when we woke him up at 9ish AND 11.30ish he would stay dry. HOWEVER, he is a very deep sleeper and even though I'd make him walk through to the bathroom and he'd do a wee, he was still essentially asleep with his eyes open and have no recollection in the morning. On the nights he was wet, he'd generally sleep straight through, despite being completely soaked!
I had a really good study of the ERIC website at the weekend and I've concluded that of the 3 reasons for bed wetting (poor arousability, lack of hormone and bladder not stretched enough) he has all 3.
ERIC says not to lift him to wee as it won't solve the problems. So we are going back to nappies again for now cos the poor lad is knackered (which apparently also slows down the production of the hormone required).
We are working on stretching his bladder by giving him a pint of water in the morning to drink in one go (and then encouraging lots of drinking through the day) but stopping all drinks after 6pm.
We are going to leave him for another 6 months to see if the hormone kicks in and that solves things, if not we will try the alarm for the arousability side.
I completely understand your concerns. When I talked to my DS about going back in nappies he said, but I need to be out of them before someone new comes to stay, so he is starting to become self conscious which makes me so sad (we have been very careful not to make him feel that way).
I just have everything crossed that something clicks soon.