Congratulations Vickie!
I remember also feeling very nervous and excited. I donated during a time when everyone seemed to be getting sick. I was so worried my Husband or I would catch what was going around and then the surgery would be postponed. (Thankfully, that did not happen.)
I would suggest bringing the following to the hospital:
Lip balm and your favorite hand lotion, (I find hospitals to be very dry)
a very comfortable pair of pants (I bought a pair of sweatpants that tie at the waste so I could keep them as baggy as I need to)
a loose fitting, comfortable tshirt and sweatshirt
a pair of comfotable slippers (something comfortable and safe for walking)
Phone numbers of anyone you may want to call while you are there.
Best of luck to you!

Linda