Two under 3 is a handful! Twins, or close together? Mine are all two years apart, so we've been there. I may have to try the bag system, although I reuse the plastic bags for so many things I'm not sure what I'd do without them. So far I decline help in the parking lot because we stop for buddy bucks and I have a pretty good system for getting everyone and everything in the car the way I want it. I'm also really trying to teach the older two to be independent where they can, like climbing into the car and buckling themselves in while I unload the groceries. We shop mid-morning when there are people coming and going but not huge crowds, and the area where I park has people passing by regularly.
These days, unless we're having a bad day, grocery shopping is pretty smooth. The 5yo gets a lot of things off the shelves for me and puts them in the cart, and the 3yo often plays games with the 1yo to keep her happy. To be completely honest, the very few times I've been grocery shopping alone in the last 5 years, it's felt kind of lonely! Then there are the days I drag the kicking, screaming 3yo through the store... but we don't talk about those days.
Pecos, I'm hoping two holsters will do it for me, at least for most occasions! In all fairness, I was going to have to buy a second holster anyway because I changed my plan for a carry gun after I ordered the first. I thought I'd be carrying an M&P 9c, then I managed to get my hands on a Shield. It's actually kind of nice to start carrying with the slightly larger gun (my husband's holster is for the 9c) because I figure if I get comfortable with this I should feel even better when I switch to the smaller.
Eventually, I will be looking for something that will work with a dress/skirt/pants without belt loops for church. I don't think a purse would be a good option since I work in children's ministry and don't normally keep my purse on my person the whole time.