what time do you guys usually arrive before your reservation time?
I have had the experience at CRT, on multiple occasions, being told to
not arrive before 15 minutes prior to reservation time.
As I understand the ADR system, many families have the same ADR time. The sooner your family arrives, the sooner you are seated prior to those who arrive after you with the same ADR time.
What seems to bother some people - a family with an earlier ADR that arrives after you may likely be seated before you.
Personally, I don't see the need to ever feel as if you have to arrive early for an ADR (and I am the type of person who is never late), and most of our experiences included a young child/toddler.
We typically arrive on-time unless we're just 'running early', but never 15 minutes too early. With maybe one exception the past dozen trips (75 ADR's +/-), we've never spent any large amount of time waiting to be seated. Most often, we are waiting for a Cast Member to bring us to a table where many tables remain empty. But I will admit, we typically avoid the ADR times most in demand, in part, to avoid some of the problems of having to wait a long time for tables to open.