The right date and time she might be available will be very important to learn, and very hard to decipher unless you happen to be with the bride every day, all the time. With the bride’s help, you can help plan around when she might work, or plan to pick out a dress, or another party to go to, etc. Ask her what dates are open.
The invitation list is another example of what you’ll need to consult the bride on. You’ll assume to send an invitation to every female in the wedding invitation list, and of course you’ll want to ask the bride about it too. She might have a few opinions about whom she would like to see there. If you are trying to plan early, you’ll want to send out bridal shower invitations after the wedding invitations have been sent out.
If it is a huge wedding guest list, ask the bride to select 20 or 30 guests from the list for her shower. Bridal showers tend to be smaller events, with just close friends and family. If the bride has many close friends, it might be better to ask a couple of people to help with the planning and paying for the bridal shower. You could also hold separate showers for different groups. Let the family have one and then have one for the friends.