We did not EC dd1. At almost 6 (in March), she still wears and floods a goodnight or underjam every night.
We did EC dd2 daytime and nighttime since birth. She was not EC'd at daycare and not much when we were out either. She was probably dry at night before during the day. She probably could have lost the night time diaper sooner since she was dry most of the time for months before we actually did stop using a diaper at night. She wore a cloth fitted diaper at night with no cover. Daytime she had been wearing training pants most of the time at home except when DH was watching her since probably about 15-16 months or so. At daycare they used cloth diapers. So it was really no big deal to wash the night time fitted with the ones that were used at daycare. We went on vacation right before she turned 2 and used pullups all the time. She did so well and we were on the go most of the time. She turned 2 a couple days after our trip. When she left daycare (before our trip) to go to a Montessori school (right after our trip), I decided, I did not want that 1 cloth diaper everyday. How do you wash just 1 diaper a day? So we switched her to training pants at night and when out, and undies during the day at home. After a week or so in training pants at school, I started sending her in undies. She is 2 years 5 months and is in undies full time.
dd2 has not had a night time accident in months, however, Saturday morning she accidentally peed in bed, and last night in the middle of the night too. Hopefully it is just a fluke. She still wakes a number of times at night. When she wakes the first time, I take her potty unless she says no. Other than that, she typically does not need to potty at night.
Also, both of my dds take a cup of water to their room at night. and dd2 still nurses too.