B.R.
Do you have a washer and dryer at home? Then they don't need to wear night time pull-ups. Potty training was a process and so is this. You hinder not help with the night time pull-ups. My now 2yo goes to bed in panties. I have to be mindful of what time I give her dinner and her last drink because bedtime is at 7:30. Her and her sister both ask for chocolate milk for bed but I've had to cut it out. Although my 3 year old hasn't wet the bed due to milk at bedtime, my 2 year old is still learning. So yes, I've gotten up to wash sheets. But she's wet herself enough that now she'll wake up and come get me out of my bed to go potty. At 6 years old, they can take their own sheets off the bed and put them in the washing machine, get a clorox wipe and wipe the bed down and spray with lysol (my routine) and then put new sheets on (this is all considering they are still in toddler beds).
Bottom line, you need to just put them in underwear and suffer through the training. It'll be over before you know it. :)