Interestingly a RAV4 Hybrid with about 2500 lb total cargo including trailer gets around 28-30 mpg. The newer hybrid transaxles (P710 etc) are mechanically surprisingly simple and I could see a future where they become the preferred replacement for an all-mechanical system.
Compare it to a 2022 4Runner and you'll see that gas mileage is very similar.
Toyota is known for their top tier reliability and mid to low tier gas mileage and tech.