There are just a few comics I don't follow on their own site - it's the home they were meant to have and the creator can make sure they're experienced the way they were meant to (unlike tapas' rigid sturcture).
If bookmark checking is not to one's liking I, too, can recommend Comic Rocket as a hub/library. They link to each single page rather than storing content and monitor your progress so that you can pick up at the point you left off at a later time, or have that particular comic appear in the "pages to read" tab after an update.
Also following creators on social media and to get their update notifications is a possibility (next to getting those you're also showing that creator your support by increasing their subscriber numbers )
EDIT:
Also one of my followers has a document set up in their sta.sh (deviantArt's file storage feature) with all the links they check regularly. It's a regular source of traffic form that user, as I've seen on Google Analytics, so something in that way might also be a possibility.