I've thought about hiring someone to help but my son has social anxiety and other issues and I feel more comfortable if it's someone that he knows very well and that's not possible.
There's a couple other moms that do the same thing so I'm thinking maybe what we should do is possibly figure out a sort of way to watch each others and maybe take turns.
One thing that comes in handy is my husband and I do shifts. If he's on afternoons then I only do the pick up at the end of the day. If he's on days then I only do the morning drop off.

It makes me more nervous to have to set the wagon out to load it up or unload it of kids (that can get out at any point and take off if they really wanted to) than to leave them unattended. I'm comfortable enough to ask my parents if it's ok with them.
2 of my moms leave infants in the vehicle while dropping their toddlers off and they come inside and sometimes even chat so I can't see them having an issue with me being in sight of my vehicle and out for 2 mins! lol You never know I guess.