Translation of introduction in Spanish

Hi, I think it might be easier just to correct your letter here, and then I'll send you another email. I'm really sorry but I don't think you are old! What are you up to? Everything else is an individual decision...
We joined the mass and climbed it. The stones were a little slippery and I doubt that this place is accident free. Climbing big slippery stones was not an easy task but we managed it slowly.
The next morning, we got up at 5, had breakfast and headed back to the same airport where we landed a few hours earlier. The 1 hour flight was packed with lots of tourists of all ages, mainly Americans.