Except they can't because, as was pointed out, if you live in social housing or get help towards your rent, you're not allowed to pootle off somewhere else to live for X weeks of the year, unless we change those rules.
The caravans and tents they sleep in are also not suitable for families, nor are the sites anywhere near most schools.
There are reasons Brits don't work as fruit pickers, and it's not because they prefer living on £400 a month, which is the going rate for UC for a single person.