Call AC reservations and ask them for the loads for that day of week for a few weeks in advanced and that will give you a better idea.
As an example, this upcomming weekend (as your dates are SAT/SUN/MON), here are the loads for
AC015:
Sat
Available Seats:
First: n/a
Business: 0 J/0 C/0 D/0 Z/0
Coach: 8 (at least) Y/8 B/7 M/5 U/5 H/0 Q/0 V/0 W/0 S/0 T/0 L/0 K/0 N/0 G/0 P/0 E/0
Other: 0 R/0
Sun
Available Seats:
First: n/a
Business: 9 (at least) J/9 C/7 D/5 Z/0
Coach: 6 (at least) Y/6 B/6 M/3 U/3 H/0 Q/0 V/0 W/0 S/0 T/0 L/0 K/0 N/0 G/0 P/0 E/0
Other: 0 R/0
Mon
Available Seats:
First: n/a
Business: 7 (at least) J/7 C/4 D/2 Z/0
Coach: 4 (at least) Y/4 B/3 M/0 U/0 H/0 Q/0 V/0 W/0 S/0 T/0 L/0 K/0 N/0 G/0 P/0 E/0
Other: 0 R/0
It should be noted that these flights do have availability (at 5-7 days out) but seems like a popular flight. You should perhalps check out AC007 (YVR-HKG)
AC007
Sat
Available Seats:
First: n/a
Business: 6 (at least) J/6 C/4 D/0 Z/0
Coach: 9 (at least) Y/9 B/9 M/9 U/9 H/9 Q/9 V/6 W/1 S/1 T/0 L/0 K/0 N/3 G/1 P/0 E/0
Other: 0 R/0
Sun
Available Seats:
First: n/a
Business: 9 (at least) J/9 C/5 D/5 Z/2
Coach: 9 (at least) Y/9 B/9 M/9 U/9 H/8 Q/8 V/8 W/5 S/5 T/0 L/0 K/0 N/6 G/5 P/0 E/0
Other: 0 R/0
Mon
Available Seats:
First: n/a
Business: 9 (at least) J/9 C/9 D/9 Z/9
Coach: 9 (at least) Y/9 B/9 M/9 U/9 H/9 Q/9 V/9 W/1 S/9 T/1 L/1 K/1 N/9 G/9 P/1 E/1
Other: 9 (at least) R/9