Your links aren't working for me, but for the number of guests you have, I'd aim for 100-150 items between your two registries at a variety of price points (some people like to make a basket or diaper cake with lots of little items, some like to go in together for a big group gift).
I'd include anything you would purchase yourself to use in the first year of baby's life. I wouldn't recommend registering for clothes or toys because clothing stocks change so frequently and are different in different stores, it will be hard for people to find the items you want. People also usually buy a ton of clothing off-registry and you'll get tons of toys as presents down the line.
I'd make sure to include: nursery furniture, bedding, diaper changing supplies, bath tub and supplies, swaddle blankets, car seat, stroller, PNP, swing, bouncer, nursing/feeding supplies, toiletries, and a monitor.