Provide all your your WordPress site widgets with BuddyPress specific fields option. Display them conditionally on specific BuddyPress pages.
Using BuddyPress Extend Widgets your all site widgets will get specific BuddyPress display options and you will be able to select on which BuddyPress pages (users profiles or groups pages etc) you want to display certain widget and on which don’t. This gives more flexibility in arranging your sidebars and other widget areas.