C7000 configuration with R7000

Hi, I have a C7000 gateway and a R7000 router that I want to have working together. I have Xfinity Blast service. I want to know which mode is better bridge or router? Should router mode be disabled on gateway? I am also setting up surveillance cameras? Should they be configured for the gateway or the router? Should wireless be disabled on the gateway? Also , what are the best settings for the gateway and router for getting the best speed performance. Thanks for your help.

Wil