It's true, Donna... If you bring a child, it makes it difficult. Of course my son is 4 and would be wanting to get out to play, eat, have ice cream, etc.
Fortunately, my mother-in-law is that doting grandma type, and my husband, MIL and son will probably spend a large amount of time together. Oh, my husband will come to Boston with me (I hate that traffic... heh heh), but other than that, he's not much for genealogy. But to stave off boredom, he may join me for other trips.
I do try to be organized. It makes life easier, for the most part. Right now I've got to finish cleaning the house for our house-sitter, start supper (it's 4 p.m. here, and I've got potatoes to peel), and hope my nephews (whom I often babysit over their summer vacation) don't drive me completely insane before Friday.
Ah, 2 weeks without babysitting... BUT 2 weeks with my MIL... Hm, is it worth the trade-off? Throw in the genealogy and, yeah, it is!