We went to the Falklands on an Antarctica cruise last month. We saw 4,000 penguins at Volunteer Point with Shaun Jaffray. It and his tour was wonderful! Along with a bag lunch you also get a little penguin thumbdrive of photos.
If you have a little time after you get back to Port Stanley ask to be dropped off at the shop that has artist wares instead of going to the gifts giftshop with stuff from China. Their post cards were the most beautiful of our whole trip.