In reply to Clauso:
> I've backpacked the Pennine Way in a light pair of Inov-8s. I was blessed with good weather and the shoes were great, although things may have been a bit unpleasant if I'd have been slooping about in deep mud for any length of time.
My other half and I did a few days on the pennine way when very new to offroad running. We used one of the early Inov-8 Mudroc models. It snowed - drifting to head height in places. Miles of bog. We had gone light and got cold, but feet were not an issue (apart from those damn heel cups) and were more than adequate to keep us moving and keep our toes alive. Pretty sure my other half went with the 'sock/sandwich-bag/sock' approach, more for warmth than waterproofing.
To the OP - it depends a lot on preference. If it were me I would, without doubt, take some light fell/trail shoes and a pair of flip-flops. Maybe swap the flips for some rubber plimsoll type trainers if you need to go to smartish restaurants/dining-rooms at any point. But I have never minded having wet feet for a bit after going through a bog - the advantage of light shoes that get soaked is that they also dry out fast. I'm also lucky that I never really seem to get blisters or other foot problems. If you're staying low, then you don't need to worry quite so much about getting serious exposure or getting stuck with freezing feet and no hope of shelter.
If you're someone who tends to suffer with cold feet or get other skin issues, you might need a bit more to work with. Probably upgrading the flip flops to a second pair of light trail shoes or even just running trainers might give you something more 'normal' that can also be used for walking if your feet are fed up with the main pair? My GF likes gore-tex trail shoes as they stay dry in bracken/ferns and wet grass, though obviously not a good choice for full submersion!
Taking heavy boots for this kind of thing just seems like masochism to me, but a lot of people do it and swear by it so there are other ways.
For gaiters (I never bother apart from in Scottish winter), it might be worth looking at the little snow or alpine gaiters you can get. They won't keep you dry in a bog, but will give you a bit more warmth and resistance to water ingress if its just odd splashes.
Post edited at 16:42