I have noticed that whenever I go over a road bump or general bumpy area in road, my 2000 Grand Caravan sweaks awefully. Is this just the struts? Is there any way of lubercating them or whatever may be causing the loud sweaks?

 

could be in the struts
could also be in the swaybar bushings and endlinks or control arm bushings

my2000 squeaks in the swaybar buhings

 

Are those tricky to replace?

 

sway bar and endlinks not at all (you can try squirting oil into the swaybar bushings although if it does work it will not last long)
control arm and srtut a little more involved but not difficult, couple of special tools you will need for those tho (spring compressor and a press)