Providing it secured in your van properly then there shouldnt be any problem jampot.Too many do gooders on this site mate.its what you feel comfortable with.I,ve used ibcs for the last 4yrs and know other users who have no probs with them.I had a tucker system fitted by them as my 1st system and guess how it was fixed in to my escort, ratchet straps.....
Wayne
Do gooders, or other people that have a different option than your own

The problem with an ibc is if half full the motion of water can/will become dangerous.
when turning a corner this could become a problem, I am not dead set against this idea at all as I know others use them.
why not just buy a baffled tank and put that in the van this is what they are made for afterall. and people that are using ratchet straps fair play on them, it is not the strap that is the problem it is the fixing it is on that is dangerous on many.
if fitted correctly and baffled correctly an ibc would to fine.
To me it sound like to much messing about so I would get a baffled tank and have someone install it unless you know how of course.
Ian