I'm inserting large inline images into my text flow, which it then breaks the flow and disappears. Is there a way to have it automatically resize to fit the text frame's boundaries?
There is no way for InDesign to contextually scale inline images. However, if the images are single color vector images, you can import them as glyphs into a custom font using something like IndyFont. It turns InDesign into a font editor, allowing you to paste in vectors, and save it as a font (even a single-character font). InDesign treats the font glyphs like any other letters, accepting color swatches and scaling with the rest of the text.