It's difficult to guess, rates vary throughout the year as mentioned. Actually the suite prices do not vary much, compared to the non suites IMO.
I just noticed
DCL site won't let me book/price 7 pax.
I found a 11/30/13, Wonder, 7 night, cat S, 2 bedroom, 1st two pax @ $3850, average for each addition at $720, so for 5 it came to 10.2K, but add 2 more and it would be around 11.9K.
This sounds a bit high to me. It's because it's not booked far enough out.
These prices are higher than most other lines, but few, if any, offer a stateroom for 7 pax.
The Magic and Wonder are the ships with these cabins, the cat R and S, that sleep 7. Great cabins BTW. The Magic will go to drydock and get a refurb, and be ready for sailing 10/20/13. So if possible book her after referub.
IIRC the Wonder will have her refurb the following year.
Some book multiple non suite cabins instead of the high price for the suites. You have to price it out. Sometimes it's more, sometimes not.
I now see you are interested in 3-4 night sailings.
Found Magic, 4 night, 11/5/14, cat S, 1st 2 pax @ 2120/ea, each additional @ 400. So for 7 pax $7-8K. Cat R for 7 pax, $9-10K
Magic, 4 night, 11/19/14, cat S, 1st pax @ 2040/ea, each additional @ 400. So for 7 pax $7-8K. Cat R , $8-9K.
See DCL website for info;
http://disneycruise.disney.go.com/reservations/booking
DCL website cabin info for these suites;
http://disneycruise.disney.go.com/s...r/suites/concierge-royal-suite-with-verandah/
HTH