Big W,
We went in August, ( around the same time as you ) sorry to say, but it was a pretty shitfull experience to be blunt. Us as parents really had to put a brave face on in front of the kids and just persevere with the massive queues, the lack of effective ventilation to get relief from the heat, waiting times were 45mins to a little over 60 mins. Factor in also that HK disney has retarded height restrictions, set at 125cm ( for the cool rides ) which meant all of my children couldnt go on the really fun rides !
Lucky for us Tokyo is close by, so we visited Tokyo Disney 2 weeks later to redeem ourselves, which was fantastic, greatly helped that their min height restriction was between 90cm and 105cm ( Euro Disney was 107cm so still ok ) so we could get on cool rides like the Thunderbolt Railway etc. Queues on average were around 25 to 40 minutes, very orderly, a much larger park and the cost of food and beverage was very reasonable only being about 20 - 30% higher than outside the park, unlike HK which charges $25 for a small bottle of water ( over 200% mark up ! ).