Hi Robert,A Circular Polarizer and a ND filter or two could be useful, though I the CPL would be difficult to use on your 18-55mm since the front element rotates when focusing.On the 70-300mm it won't be a problem.
Copyright © Nikonians 2000, 2014
All Rights Reserved
Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.