50 ft is nothing with a Better Beamer. Don't you set up your flash and Better Beamer when you go to the beach on a sunny day?
Early on when I started shooting birds, I followed someone's advice on a forum similar to this and bought and SB-800 and a Better Beamer. Clearly it was not possible to successfully shoot birds without flash. Going on six years or so now and I have NEVER used a flash for wildlife of any kind and the BB never came out of its packaging after the day it arrived in the post. Then again I suppose one can argue that I haven't been very successful shooting wildlife
No doubt there have been one or two times over the years when I wished I would have had flash available to me. But EVERY time I'm in the field I'm thankful not to have that extra bit of gear in my backpack. Maybe some day when I live somewhere that I routinely shoot out the car window, I'll toss it in the back seat and bring it along