I'm prepare for the worst liao,did a search from google ,seems
to be a very xiong unit,somemore it combat reservist unit,sian
ahhhhh.
PDF - people's defence force loh. so be prepare to defend
Singapore. 
it is at Clementi Camp. Nice camp. Can see MRT trains
everyday.
u might be doing POI duty (just like 6 SIR) for reservist or
coastal defence (protect singapore at the shoreline) - dugging of
trench and filling of sandbags etc etc.
i am from 2 PDF and undergo many high keys alrd. Can say
xiong some times, but still can take it lah. Xiong is when going
for mission exercise or field exercise. Rest of time, just follow
what other do, cos most of them are from service vocation,
including SGTs and maybe PC.
For ICT, usually is go range/outfield for section movement/live
firing (this is fun)/lectures (can fall asleep!)/weapon training
etc etc, nothing much lah.. got little bit of chiong sua lah..
but dun worry lah.. usually it is walk one lah. from 3rd highkey
ICT, willhave mission exercise for those coastal defence unit loh.
usually go simpang for 4 days 3 night camping loh. those WO
Trainers from 2PDF are quite friendly but not for those 2LT
trainers loh.
and i think 821/822 SIR (should have 2 more units), are going to
replace our batches, which will be completing our cycle (two more
high keys) in a few years time. and usually they will give at least
6 months notice for high key ICTs.