Hufty
Hot 'n High
A very important point, missed by many, the aircraft and engine are not the only bodies running out of air.
So are you, and if your normal flight levels are in the UK style 1500' then flying at 10,000' may upset your reasoning process.
High Plains and Highveld fliers, used to aerodrome elevations of 6000' are not too upset by flight at 10,000', but think about your body and get a local to come along for a couple of rides, just in case you forget something. You do acclimatize after a while dependent on your own state of health.
I can confirm that it is not unusual to lean for max (possible) power at takeoff.
Enjoy the experience
Sultan Ismail