I've purchased a plugin called WP-Members. WP-Members™ puts the registration process inline with your content (and thus your branded theme) instead of the native WP login page. It requires bookstraps and hooks to make it look and do what I would like for it to (not to mention some stylesheet work). I even purchased the premium content on the plug-in site that explains it all in detail. I would like to have a "Bootstrap sidebar login", a Registration page that is appropriately styled, and a Members Area that is appropriately styled. All of this is detailed in the premium content I purchased with the plug-in. I've included some examples of that content.