Just wanted to comment that we brought eye masks and they were very helpful. It helped our 4 year old nap in the parks and sleep at the end of the day. It also helped us sleep in on days we weren’t rope dropping.
They can come in handy for light leakage on hotel windows, too-bright always-on LED’s on TV’s, sleeping on planes, etc.
For hotel curtains that don’t close, I bring binder clips. Some people use the skirt hangers for this, but those are heavier.
For hotel LED, microwave, and thermostat lights, I bring post-it notes.
Tips from my husband who used to travel for work 75% of the time.