@andyburke @pixelfed I would suggest you add your accounts on both services (as in ”follow yourself”) and then I would post photos on Pixelfed (as that is what it is made for) and text-based posts on Mastodon (as that is what it is primarily made for) and then re-toot/re-share from the other account when suitable.

So you would then post a photo on Pixelfed, it comes up in your home stream on Mastodon where you re-share it. That way people also will see your ”other” account and can add it directly if they wish to do so.