Etiquette question: I am hosting a bay shower at my home: am I also supposed to buy a gift? Some guests offered to help with food/drinks: should I have them do that in addition to gifts or should I carry the cost myself and not buy a gift

OP: Thanks for your reply. Should I tell guests to bring something small as far as food/drink or enough for 20 pple I am hosting? They would probably also buy a gift, so I do not want to overburden my guests. One of them asked what she should do to help, and I said: bring some pastries, we will have 20 pple. Now I feel guilty I said that, probably should have said "bring whatever you would like". Thoughts?