Don't know why they wouldn't let people bring in tripods, but like you said, you don't want to schlep a lot of stuff around.
Do you have a monopod? That might come in handy for the Nikkor lens.
This sort of thing is why I've invested in fast lenses with image stabilization. They're pricey, but often let you shoot more often with natural light while leaving the tripod at home.
2015 435i / Mineral Grey / Black Dakota Leather / Premium Package / Driver Assistance Package / Dynamic Handling Package / 18" 397 wheels / M Sport Brakes
2012 550i / dark graphite / cinnamon brown dakota leather / premium package / sports package + 19" W-spoke 332 wheels / active roll stabilization
2012 335i coupe / M sport package with 19" Star-spoke 230 wheels
2011 550i (destroyed)
2010 X6 5.0 (destroyed)
2008 335i Convertible