you can enter a 2nd email address where the turns get sent to. Important: Your ally would need to do maketurn for both at the same time, otherwise, host will complain.
And usually, you should only miss 2 turns, as you can either do a very quick one before you leave, or do one just in time before you come back.
and you could set up a cplayer to do your turns as well, but I'm not too certain about the details, since I never did that.
Wirklich reich ist, wer mehr | Truly rich is, who holds
Träume in seiner Seele hat, | more dreams in his soul
als die Realität zerstören kann.| than reality can destroy.