D.: Tell your hubby it's not about the Pull-Ups b/c we have the opposite effect in my house with my 5 1/2 yr daughter. She has been potty trained since a few weeks before her 3rd B-day but nite time is still a struggle. We go through phases, 4 to 8 weeks of dry Pull Ups, I get tired of buying them plus they're expensive! I go without the Pull Ups and then she wets again, but in my house we all bed hop, so last week alone I changed the sheets and mattress covers 3 times on 3 different beds! UGH! That is not fun on top of all the other laundry I have!
We've tried limiting drinks before bed, having her go potty before bed, again when we go to bed, it just doesn't matter sometimes. She is a heavy sleeper, and when she's out she's out! My MIL told me just this weekend that my hubby wet the bed until he was about 8- he's a deep sleeper as well.
My almost 4 yr old has been potty trained since before she was 3 as well, but did not wet at nite for many months before that. She continues to stay dry at nite, no Pull Ups needed for her.
Bottom line, every kid is different and goes at their own pace. Your son probably won't be wetting the bed on his wedding day,-but there are pills for that! I feel your frustration. Your son is still young and the Pull-Ups can save you alot of headache. If your hubby insists, have him changing the sheets and running the laundry loads, I bet he'll change his tune real quick! Good luck!