G.G.
My M. and I threw a baby shower for my sister-in-law who was due in late December. We had the shower in late October and did a Little Pumpkin theme. The invites said something along the lines of "there's a new pumpkin coming to the patch". We had in a restaurant, but home is fine, especially if you have nice yard or patio that you can decorate with pumpkins and fall flowers/foliage, etc. Isn't Cuomo catering in Northlake? They have good food at very reasonable prices. We did centerpieces of small hay bales (bought at Michael's) and then put a ceramic pumpkin on top of the bale (bought at CVS. My brother (the daddy) added teddy bears that were holding pumpkins to the centerpieces and then we gave those to the kids as party favors. For the adults, we got pumpkin candles at Walgreens for $1 each. If you go to a dollar store or drug store, you should not have any trouble finding cute pumpkin themed items for party favors. As a gift, we gave the couple a ceramic pumpkin with their last name carved into the mouth. I got that from a website called ceramicscraze.com. If the baby's name has been decided, maybe you could get that name in the pumpkin's mouth instead.
Also, try this website http://www.ababyshower.com/lpushth.html
Sorry this is very long. I enjoy party planning and get really carried away. Congratulations and best of luck.