Doing some volunteer work this weekend for an organization that trains assistance dogs. They are holding a fundraising event and I've offered to cover the event. You know the drill: cocktails, silent auction, dinner, program, dancing...and then out the door. Using my D7000, but thinking about what lens to use. Right now thinking 17-55 as my primary, with 70-200 for shots during the formal part of the event when I'm likely in back or at the side of the room. I will not have a chance to look at the venue before, but I'm assuming lousy light. I'll have an SB800 on camera, but hope I can get a few shots using existing light. I'm open to renting another lens if anyone has a better idea (I also have a 85 1.8G and a 50 1.8D). Wish I had a spare body but I don't. Body notwithstanding, am I covered?