Ideas for small families -- I like to use quart-sized mason/canning jars... just the right size for two servings, possibly with some leftovers that would make a hearty breakfast for a new mama. You could also get 12oz or 16oz mason jars for some single servings when you're alone with baby during the day or just need an extra snack, or if you want to stretch your meals by pouring a smaller amount of stew over a baked potato or rice.
When I make these meals in the last trimester, I plan to make a little more than usual and just siphon off the extra to freeze. That way I can have a variety of things stored in my 1-quart jars instead of the same thing repeated over and over. (Ziplock bags are a great option, too... but I like to use less plastic, and the jars can go directly in the microwave to thaw.)
I have a normal sized freezer, so I will need to be fairly conservative with what I make ahead. Because of that, I am aiming to make frozen make-aheads last longer by supplementing them with something easy (chili over a baked potato, stew over rice, grilled cheese sandwich with soup) -- or by freezing just part of the meal (freeze meatballs, eat with storebought sauce and spaghetti, freeze cooked/marinated chicken, and steam up with some frozen veggies and rice; freeze shredded, cooked chicken, throw in the crockpot with chicken stock, tomato juice, and frozen vegetables for soup).
I do want to have a few meals on hand that require no preparation whatsoever, but we just don't have the space to have all that many meals like that.