I like the bicycle hooks you are using. I am fussy, so I would probably add a short piece of rope, or chain, or shock cord to keep them from falling off if bumped.
A lot of guys build shelves - that lets you 'nest' saws (so that the bars point in both directions) so they take up less space. Some guys bore directly into a post or log to make a chainsaw 'tree'. Some of it depends on how accessible you want your saws to be, or if you want to display them for others!
Philbert