Re:

["Marc Myers" primatemarc]

Mike gives good advice about alkalines. No recharagble batteries have great=
er stored capacity or retain their charge better.
Knowing that it is always better to have way too much power, how many hours=
 of operation do you expect in the two months? Do you have weight limitatio=
ns (does everything have to be hiked in, for example)? You might also consi=
der a solar recharging station. My experience with them has been mixed but =
they do provide a second option, solar + alkaline backup would probably be =
my choice.
Marc