Went last week. Visit was part of a weekend trip form the local paper. I was the youngest on the bus (51). To be honest parts were a bit theme parky for me but the biomes are very well done. I think entry was 16 but may have been 20. Have to say on pure gardening terms we found Lost Gardens of Helligan to be better. Others visited in a hectic (for pensioners lol) were Trellisic (doesn't look right no matter how I spell it) and Lanhydroc.
We stayed in Newquay, what a dump. If going independantly probably would stop on south coast (St Austell or Falmouth)
ive been several pimes mate it`s brilliant and exiting the first couple of times you go round but it gets a bit boring on the 4-5 visit.
if your wanting to have a good undistirbed look around then dont take the kids as they get fed up after a little while.
take your own refreshments as the ones on site are very expensive.
the lost gardens of helegan is great i visit every time i`m in cornwall its a fabulous place.
its a long walk mate and you`ll be on your feet all day, there is a refreshing stop at the water fall.
hope the weather holds up for you mate take some sun block with you cos the domes let the uvb light in.
have a great day mate i know youll enjoy it.
Very hilly, plus there's either a very long walk from the carpark or you can stand around waiting for a bus and then stand up on the bus journey, could see it being a problem if you have problems walking :-/
Actually busses were the only fun thing about the place, they're like two joined together with a bendy bit in the middle.
Visit your local garden centre, exactly the same thing but don't cost 50
lobby, you are so right........
may well be contacting you but 'she' is really not keen on caravans.. i'll ask.
harry and serious... didn't think of 'hilly' just thought it would be crip friendly, that could well be a problem as i am now getting some very bad pains in my feet as well as my legs.. 'they did warn me'
still ya cant let these obsticals beat ya, i want to go as much as she does so its looking good so far.
Bear believe me its not worth the pain and agony you will go through, [:C]
if you do go I don't think you will forget it in a hurry. [V] 
Just a suggestion,
I think a short Coach break on half board basis for a few days would be better,
and let Mother Bear be waited on for a change which is as good as a rest
just relax and chill out with no hassle. [:T]