If it was me I'd do the artwork for the individual ad's in InDesign, save them as individual PDFs and then import them into the 'event program' InDesign document.

InDesign is a page layout program and that is exactly what it should be used for, layout.  Try to keep Illustrator for creating complex vector artwork only. InDesign's typesetting tools are far superior and quicker to work with than Illustrator's, this is no coincidence.

I sometimes visit other ad agencies and chuckle when I see designers using Illustrator, or god forbid an old copy of Freehand, to create copy heavy double page spreads.  Usually the designers in question are Luddites who miss rubbing down Letraset and reprography.

Ad layout for programs - Illustrator or InDesign
A toddler's food intake seems very little: only milk and water and some solid food. Therefore, from where does this energy come?
