This wouldn't work at all on either of my kids. Well maybe my youngest. But my oldest, not a chance.
My 8 year old.... From the day he was born, I knew he would be a challenge. I was 33 when he was born, and my parents were 35& 40 when I was born, so I was sure I was going to be the parent that said no and meant it, and would stick to it bc my parents were very authoritarian and my way or no way, and I'd never have dared to defy them (too much anyway). This child has challenged every way of parenting I have ever thought of. I won't go into all of it. I just bring it up to say, it isn't always as easy as "nip it in the bud the 1st time" Because as a parent you can do everything right, do everything the "experts" say you should do, and sometimes none of it will work. Sometimes it takes the exact opposite of what you are supposed to do. I love my kids with every fiber of my being, but it is hard being the parent of a child who is not neurotypical, and hearing this advice of just "nip it in the bud" only makes it seem like I must be a failure when I can't. Just my 2 cents.
To the OP, take your toddler. There will be tantrums, but so what. There will also be amazing memories, and great times. There will always be tantrums, but you will get thru them. Take the trip, it will be worth it.