My DD is 18 months and we've travelled quite a bit. I've gotten to the point where I take a minimum of toys with us, since she's far more fascinated by the new "things" where we go than with just her regular toys. Sure, I take a few good books and a token toy or two, but we figure out the rest when we get there.
Example: last time we were at MILs (5 hour trip away) she liked playing with her measuring cups that could nest, plus she spent literally hours putting a lot of jars of vitamins (childsafe caps) into a large pan and taking them out.
I realize you're not going to someone's home, so you'll have to take other things, but last time we were at a hotel, she liked playing with DH's empty soda bottle - cap on, cap off, cap on, cap off. The little shampoo thingies went into the ice bucket, you get the idea.
So, still take toys but keep your mind open to other stuff when you get there.
Homeschooling mama to 6 year old DD.