My setup when I travel for a short period of time between 1 - 2 weeks. Although I've also traveled for over 3 months and only brought my Samsung S10. When I travel, I want to have a worry-free experience rather than thinking about my setup, so preparation is key. The main thing about traveling is when you lose your phone/cash/documents, and if you don't have a backup, it'll make travel inconvenient. So make sure you have proper backups.
So here's my setup:
2 Debit cards
2 Credit cards
One on your person, and one lives in the bag. If you have a smartwatch, it's a great idea to put in your backup cards.
Do not look like a target, and walk with a purpose. If its good to be true, then it's a scam.
Learn the basic local language
I used to buy a local sim after landing, but I figured the airport/hotel has WiFi and I can find my way using offline Google Maps. Make sure to download and test it before hand. You can also use Organic Maps to map your routes, but OM is not as reliable as GM.
App setup:
Bitwarden: This is one of the most important app for me when I travel. My travel docs are stored here.
WhatsApp/Signal: for when I lose my phone, and need to get my 2FA from a relative.
Stock camera
Ente.io/Immich for photo backups
RSAF for cloud/file backup of important docs
Plane, accommodations (Agoda), etc can be booked on your browser. I used Addy.io for email signups, a random phone number (They will never call). You can grab your physical plane ticket at the counter if you'd like.
Deepl/Translate You for translation
JMP.chat for a VoIP number in case your bank calls you to authorize a purchase.
This should cover you during your travel. Most of the time you'll be out and about, so you won't need the laptop or tablet, and you'll be exhausted from exploring.