Welcome! So I'm assuming by reading this that you are breastfeeding your son and you want to see if your diet change will translate to healing his skin. Sounds like a good experiment, keep us updated on the results!
Also I understand about the planning ahead thing as that has been my biggest struggle. Cutting out grains was no big deal for me, since I saw vast improvement in my digestion and general energy. But it is still hard for me to prepare lunches ahead of time so I still rely on eating out for lunch. I still manage to stay Primal in doing this, but I'm getting tired of eating at the same few restaurants.