When I worked for natural resources there was a call about a lot of broken glass down a river bank. It didn't take long to figure out that some greenhouses were once nearby and it all got thrown off the hill.There was now way I was cleaning it all up, it was just a 3 month gig.
I'm more of a passive collector now-a-days but I did break down and get the Poison Bottle Workbook Vol. 1 & 2 by Kuhn, the new Bitters Bottles by Ring & Ham., American Breweries II by Wieren and about ½ dozen others books over the winter.
I also got back on two wheels after a 25 year absence. ;).
Base marks aren't all of it. Sometimes the lip area as Glenshaw or the heel for some others can help. Sometimes all you have is the maker mark changes or brand logo changes that can help narrow it down and sometimes there's really no way to know at all.
Good luck and happy collecting.
So young, sorry for your loss. My mom passed at 60 but my dad just passed at 87 in August. I could tell stories and such like it's will get easier but I'll let you grieve naturally. You need to do that first I think.
Take care, Eric