You said the oil still looks golden, up to you whether to change it but I would, since you're doing a 6000-7000kms road trip anyway. A part from tire pressures, might pay to check the rotors and brake pads to see if they require changing. Carry extra oil, radiator fluid and tools with you just in case. The camry (as most other cars), would be fine for the trip if it's looked after. :)