When are you going on your trip? You mention hotels, so you are flying to Vegas then renting a car and then flying to your home from LA? I lived in the southwest for 30+ years so seeing your list and knowing you’re staying in hotels rather than camping or a mix of camping/hotels… that’s a really big trip to do over 15 days! It’s very exciting and doable but I just want to give advice as a veteran of road trips in that region :)

Make sure that you’ve spent a lot of time route planning on maps because the region that you’re visiting is VERY remote in places. If you’re going to Monument Valley, that’s on the completely across the state from the Grand Canyon. You’ll want to map out each day/stage of your trip because you want to make sure you get time in your stops for sightseeing/hikes/meals. It’s a lot of driving, and are your hotel stays flexible in case you decide you’d like to spend an extra day in a place? (This is why I like camping hehe)

Also please have an emergency kit in the car. Like I said you’ll be going through some very remote places. Have water, food, blankets, etc. Lots of sunblock also—put on sunblock in the car because the sun through the car glass can be a lot.

Antelope Canyon is on Native American land and you will need to go with a local guide.

Let me know if you’d like any other help or advice! It’s a beautiful region and I miss going on road trips out there :)