What to do.....

There are 9 of us flying over for the Wedding and i am in about 4 minds with what Vehicle(s) to book.
Last year we had the well documented problem of the 12 seater having no luggage space and as ther is 9 of us we cannot go for an 8 seater.

Question is, Do i go for: -

1) 12 Seater for 2 weeks and a 7 seater for one day and drop off in Kissimmee?
2) 15 Seater for 2 weeks
3) 8 Seater for 2 weeks and 7 Seater for 1 (3 of the party are going home after the first week)

Any of the sites Car Hire Experts give me some guidance???

Daniel