Cheapish to stay/in near London for a family of 6

[notso]

We have Merlin passes this year and want to make the most of them so are looking to stay in or near London.
I am struggling to find anywhere to stay that sleeps us all and doesn't cost hundreds of pounds a night.
DC will be 14, 9, 3 and 2.

TIA

[mary21]

Camp, yes there are campsites in the London area. University accommodation. Travelodge. Youth hostel. Any preference where you want to be? Or house swap?

[theyoniwayisnorthwards]

Check our air bnb or short term lets.

[theyoniwayisnorthwards]

Check OUT, not check our.

[mary21]

www.leevalleyboats.co.uk/chalets_availability.html
housing.london.ac.uk/cms/university-housing/visitor-accommodation/

[notso]

Thanks all, will have a look at all suggestions.