Ok, whinfell quite hilly in parts, accomm much better with regard to space in lounge area and bedrooms especially the 2 storey alpine ski lodge looking things (which we used to stay in - they are on Foresters if you look on the map in 3 loops) look on the map www.centerparcs.co.uk/villages/whinfell/map/ download the PDF (bottom right hand corner) then zoom in. Fell View I am sure is up a steep hill.
We stayed in 57 Foresters and the view at the back is fab as it is just over woodland, because of the angle of the villa you don't see much of any other villas (we book that villa each time we go, it's a 3 bed) The villas are double height in the lounge BUT the main bedroom is downstairs and the two other twin rooms are upstairs so it depends how you feel about sleeping on a different floor. And it does have 2 fitted childgates at the top and bottom of the stairs already.
Sherwood, relatively flat. Pool is much bigger and has a separate little area for young children ie ankle deep and warmer.
I have been to CP so many times that the memories blur a bit but yes the pool, cycling round, exploring the woods is all great so don't feel compelled to do any extras. Some extras are great and are worth the money, some are ok.
We hired bikes with trailers which the children can go in from 6 months old so you can put both of yours into one, make your dh/dp lug that behind him, these trailers have a bit at the back for your shopping and can keep your wee ones dry if it rains or as it has happened to us - snows!
All restaurants have child play areas (some better than others) lots of outdoor play areas.
Elveden is by far the best in our opinion because the centre burnt down and was rebuilt taking customer requests into account.
Whinfell's centre is all under cover so good is it is peeing down with rain, sherwood's isn't but it doesn't seem to stop anyone going anywhere or doing anything.
I did whinfell with a 3 yr old toddler and a 7 week old baby in a pram!
Oh and don't feel embarrassed about getting off your bike to push it, loads of people do. It is not fully of athletic people powering round the place!
I have kept price guide so if you want to ask anything specific then do.