I was just married at the Dreams last month. My wedding really was the wedding of my dreams! The staff is fantastic, the food is good and the wedding coordinators are awesome! There are very few beaches in Cabo that are swimable due to the strong undertoe. You cannot get in the ocean at the resort as it is extremely dangerous. We did our TTD at one of the "swimable" beaches about 5 minute drive from the hotel and i still almost drown. But the pools at the resort are amazing!
As for nighlife at the resort they have a "night club" that stays open until 2 or 3, i didnt go while we were there but all my girlfriends went a few times. They had a good time but i dont think its anything like the clubs or nightlife in town. And it really is a $25 cab ride each way to and from Cabo. It got pretty pricey to go back & forth, that was one of the downsides of the resort but we were happy mostly staying at the resort anyways. But when it came down to the wedding it was INCREDIBLE! I would not have changed anything , here is a link to some of our Pro Pictures if you want to see how the wedding turned out and how perfect the resort it http://blog.faberphotography.com/destination-wedding/dream-wedding-at-dreams-los-cabos-mexico/2011 Hope this helps