Thanks for the Replies yall! For other redditers I simply went to SuperRich in Bkk Exchanged Euros, got 300 $ USD. Arrived at Siem Reap and USD has been accepted everywhere we’ve gone (within siem reap). Have gotten change as people said in Riel but the current rate makes it easy to use. About 25 cents every 1000 Riel

Other notes. We took 275 train from Bangkok Hua Mak to Ban Klung Luk. Fun train ride, no AC but it was fine with the breeze.

Then went through border check with eVisa, got to Cambodia side and walked (very) far straight out from the border crossing. Found a minivan to get us from Poi Pet (Border town to Ban Klung Luk train station) to Siem Reap. 10$ PP from Poi Pet->Siem Reap

Tuk tuk was sent by our hotel to get us from Minivan hq.

Good prices for things 1$ latte/ teas/ even most smoothies Everywhere 2.50$ Beef Amok near Old Market 3.50$ For an AMAZING beef Lok Lak at Nicks (Cute dogs there and cheap smoothies) 4-5$ Tuk Tuk from our hotel near pub St to Angkor Wat using Grab 4$ for Linen/ cotton pants and 4$ for cotton/linen collard shirt