Is it possible that you can go alone and commit time for YOURSELF!!! Firstly, I was raised by a fitness focused mother who felt the exterior was far more improtant than the interior. So with great pride I can tell you that my once muscular and fit body went to the dogs after child birth. Has my habits changed YES!!! I take time for my family more than I do for myself. It has been 10 years and I am trying to put some foucs on me to get fit.
Personally growing up I wanted to spend time with my Mom being a Mom rather than watch her workout and primp herself and could then not touch her for fear I mess up her hair or make up! That said, please realize that your value in a suit does not compare to the value of a Mom who your children can roll all over and not worry if they are interupting your YOU time!
What bathing suit you feel good in is the one, maybe look into seeing if tere are any outlets nearby that you can go have it and try a bunch on as you see other women walking in with their 20 suits too!
The sacrifices of being a Mom have sometimes come at the cost of my vanity but a price worth paying! On the upside just remember your not a man who goes bald, they can't gorw hair back but we can drop a few with a lot of sweat and tears!
Happy planning and wear that suit in confidence knowing that you are giving your children something alot of Mom's can't , YOUR GOING TO DISNEY!!!!