Hello all! We will be leaving on Sunday for our third disney cruise with our 3 yr old son. This time I am really going to work on taking more pictures myself instead of relying on shutters. I currently shoot with a Nikon d7000 and plan on using my 35mm f/1.8 when taking character shots with my son in the atrium. On our first 2 trips I only had the kit lens, so I am hoping that the 35mm lens will give me a little bit better iq. My question is whether or not Ny of you experts have any thoughts regarding whether or not I should purchase an external flash to bring along. I can get my hands on either an sb700 or sb910. I'm just not if I should pick one up tomorrow and if so which one i should get. I purchased the d7000 when it first came out in 2010 and it was my first dale. I am slowly learning the camera and the world of photography and just want to make sure I have what I need, but certainly don't want to waste any money at this point either. Any thoughts would be greatly appreciated.