I am using apple vacations, and so far they have been great. I blocked rooms in 4 different categories for 7 days. My guests will be able to choose the amount of days they want to stay within the 7 days period and the type of room they want.
I had to pay a $50 deposit to start the whole process and this goes towards my final balance (our stay). You do have to pay a deposit depending on the amount of rooms you want to reserve, here is the breakdown:
1-10 rooms - 500 deposit
11-20 rooms - 1000 deposit
21-30 rooms - 1500 deposit
31-40 rooms - 2000 deposit
41-50 rooms - 2500 deposit
This deposit is all applied to your stay or plane tix, etc. So you are not really losing any money...Guest have until 120 days to reserve their room and they can do this by paying $50 per person and then have to pay the final balance 60 days before the wedding.
I am also using this company for my honeymoon, we are going to another resort right after the wedding.
If your guests book through them, they have hotel-airport transfer included.
I can give you the contact of the girl who has been helping me. She has been great.
Hope this helps!