Normally, you wouldn't sync databases, you would share - but if either laptop is not connected to your home network, that would become an issue. Sadly, Access has not had an intrinsic synchronization function in some years, at least a few versions worth. You can still do it, but you have to build in something to link from one DB to the other and look for discrepancies. Basically, you have to "roll your own" sync routines. You and I have talked about how you take one of your laptops when you go out in the field with your ministry, so I have some appreciation of how you work, and I don't have a ready answer for you.
Now, IF the two DBs are initially the same, AND if one of the two DBs is totally static/unused while you are away, it would be possible to just replace the one you didn't use with the one you did use. BUT if both are in use and can diverge from each other, you will have to figure out what changes occurred in each one so you can do a reconciliation.