personally i`d strip it right down to belt and work back from there.
Do belt and tensioners - may as well do water pump when there and build back up via cam covers, breathers and filters last...
Others may differ... and yes A good solid weekend with no significant barriers ( all tools and parts present) and a SWMBO to bring endless supplies of tea should see it done 
EDIT - Just read pressure switch not cam belt so ignore line 2.
I'm changing the water pump - just forgot to type it in

The wife is away for the weekend with the kids to keep them out my way as the little angels shouldn't be in earshot of the effin and blindin that's most likely going to happen plus she knows she'll be chief tea lady all weekend and she "want's a life too!!!!" was the phrase

..... so am going to have a decent pile of butties and my finest thermos to hand

. At least will be able to have my ipod on loud without complaint

- really looking forward to this weekend.... though hopefully it'll all go well.
Have been debating doing the crank sensor which is very topical at the mo.... but unsure as yet as to the time it will take and whether it's absolutely necessary and only replace when failed :-/ Don't know.