Basically, you'll be doing your BMT at Sierra Wing in OCS,
followed by your tri-service term. During your BMT, the female
recruits (or cadets, as they are already wearing their 1 white bar
during BMT) have the entire wing to themselves as the guys would
still be doing their BMT at Tekong.
After the BMT phase, the guys will join the wing and tri-service
term (TST) is with the guys. Training is exactly the same
as for the guys and is done together with them except for the
standard obstacle course (SOC) which the female OCTs clear in clean
fatigue and skip some stations (as far as i can remember). Some
female OCTs may have trouble with some of the obstacles especially
the low wall due to their relatively short stature. But i think
since you're signing on with the air force, the only SOC you'd have
to do is during the BMT phase as TST got no (hardly any) SOC
sessions.
The only time you'll get to dirty yourself with mud and grime is
during the BMT phase and the 3 day leadership field camp during
TST. Because you'll be transferred to the Air Wing after your TST
where you'll kiss your camouflage uniform and all your green
barang-barang goodbye. Yes, those horror stories you may have heard
about the field camp is true (well, mostly). Go round and round, up
and down the rolling scenary of Pasir Laba training grounds in full
battle order (FBO) till you peng san. And it's all because you're
still a new soldier then, yet unconditioned to the pace and
intensity of officer cadet training. But it's ok, cos you'll get
used to it very soon. And as a future WSO, that's also the first
and last time that you'll be experiencing such 'xiong' training.
Yes, i agree that military training tends to be tougher for the
girls due to their physique. But many lady officers have been
through all that and excelled. Ever heard of the female OCT who
could complete her 2.4km run in 10min and who beat ALL the guys in
Sierra Wing to clinch Wing Best Cadet during service term 1 (ST1)?
Too bad she quitted after ST1 cos she decided to take up an
overseas Public Service Commission scholarship. Otherwise she could
well end up as a sword of honour (SOH) recipient.
And in case you're wondering, no, she was not the least bit
tomboyish. In fact she was the object of fantasy for many male
wingmates, a very ACJC kinda pretty look. 
Privacy-wise, back at wingline (accomodation quarters), the female
cadets have the entire top floor to themselves, which is out of
bounds to male cadets and instructors. (Although there's nothing to
say that the girls can't go downstairs to join their male
colleagues for a quick *ahem* in the male bunks with the door
locked). But when outfield... you'll have to do your business just
like the guys. I'm afraid I really can't comment on how the girls
cope when their "time of the month" comes.
After your transfer to the Air Wing after your TST, I'm afraid i
know very little of what those folks do, except that a period of
the WSO training is conducted in the Air Force School. But what
they learn is definitely more academic compared to the folks in
army, and minus the grime (and the fun, in my opinion).
But anyway, i think the most important message for you is to go for
it if you're interested. There's always a shortage of females in
the SAF. 
