Hi Tishi, welcome to TN

. Your GF is on the right track, generally the Camry is a pillar of reliability. My daily driver is a V6 wagon, although I have owned an i4 G3 before, as well as an ES300. Although the V6 is smoother, I would still consider a 4cyl (2.0 litre only, not 1.8).
On trips, the 2.0 regularly did 7-800km a tank (premium fuel) and it's power is sufficient for safe driving. If the car you are looking at is tidy, has good service history, and feels good when driving it, then it's a worthy consideration. Get a inspection if you aren't confident assessing it yourself.