Are you planning on a "postcard" type (quarter sheet, done on one or both sides)...or a folded card type (8.5 x 5.5 folded in half, images and text on fronts and inside)?
I have done both...on a postcard type I put images on front and text on back, and it worked fine. This is the front:
Terrific Tags 4 by fionna51 at Splitcoaststampers
I didn't post the back but it was the typical "you're invited" type of thing.
BTW, this card is actually just under 4 inches wide, because I made a mistake in cutting and didn't want to recut!!!
The full card type can have your images on the front, and text inside. There should be plenty of room in there, I would think.