We don't but then we only have a PC at home so would be a bit big to lug around!!!
Although our daughter gets her school laptop today but that will be definately staying home.
We don't have a laptop, but my hubby has shares too but he can go for a week camping and not really worry too much about them and if we happen to need the internet which is very rarely when camping maybe to check the weather we can use our phones.
We only have wireless pre-pay internet at home and that only has credit when I get around to buying some which is not very often which the kids seem to survive without. We have only had the wireless for 6 months and before that they had to come into our business to use the internet. They are still quite normal, sociable kids that are pretty well adjusted and our 14 & 12 year old daughters don't even have mobiles yet!!!!!!!
Their 17yo brother has but we live in a small country town so they don't really need one, and our rule is when they are 15 they can get one for their birthday. So far none of them is a social outcast!!!!
I think it really depends on your individual situation and preference. It wouldn't bother us if people we camped with took one either.