$500 is very expensive for what that is. I can get two of these for less and they are larger screens.

The way this attaches to the laptop is pretty cool, but I am not sure it justifies the price for me.

Bringing a portable monitor is best solution. I am in the same exact position and that is what I use.

Something like this: https://www.amazon.com/dp/B07ZLY26FW/ref=cm_sw_r_apan_glt_i_TXE3DCFTCXEDNAPNJFSS

What about something like https://www.amazon.com/Portable-Monitor-Upgraded-1920x1080-Computer/dp/B07ZLY26FW/ ?
The only problem I see is the need to be connected to a power outlet, but that is also something I would already probably do.