I agree. So long as your mum knows you want to visit and you keep in touch then she is obviously happy with this. She is probably worrying as much about you as you are her.
I would maybe do as someone suggested and book a hotel or b and b close by and then contact to say "Hey I am in the neighbourhood" Can we meet over the fence or whatever. Am sure, if you have a great relationship otherwise she won't say no! She is probably thinking of you more than her like "Don't fuss, we are o.k. keep yourself safe"
Passports not in the drawer I always keep them in. Turning the place upside down.