Open Question: camping while pregnant and four kids ?

ok so in august i am taking my batch of four to a lovely campsite in cornwall uk
i will be 6 months pregnant - so pretty big
questions
portable toilets - the campsite does have loo's but as i'm pregnant and have a 3 and 4 yr old boys
are they good, has anyone used them , are they easy to empty ?
camping in my condition - has anybody else camped pregnant ?
airbeds - are they comfy i got ones for the whole family ?
any tips on how to keep warm ? for anyone that lives or has been to cornwall - you'll know that even in summer weather temperamental)
and because my badgering me to do it after some bloke in the pub told him about it - tent sex, we have a 12 man tent so it would not be in front of the kids - there once there asleep , there asleep kinda kids - has anyone done it, is it alright ?

Source:
http://answers.yahoo.com/question/index?qid=20110530163215AAITs8T

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