I too hope your holiday goes well and you all enjoy yourselves. The weather cannot be as bad as the uk surely?
However, if you can afford it, Argos is offering the Pro Action Nevada 5 man for £69.99!! I've just ordered one as a weekend tent but its great for the price. (200cm head room)
Their day tent is also half price if thats any help.
I.m sure the kids will have great fun but you will end up with a bad back after 2 weeks.
Having said all that, if you have a good attitude about it, then go and enjoy! We all deserve a good holiday at the moment.
------------- Kathryn
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Our ProAction tent has been brilliant - even with persistent rain all day long.
For long holidays, I think you need a bigger tent and keep the 4 man one for weekend breaks. Our ProAction Arizona (supposedly 8 berth - but it is great for 4) was only about £70 on ebay and has done us fine for the last three years. You don't have to spend loadsa money on a tent - just choose one which suits you and your family. Research the tent, make, size etc you want first - then try to get it at the best possible price. You'd be surprised how cheaply you can pick up tents.
You will be better off with a bigger tent, think of the room sizes when you're looking at berth. You may be not much better off with a larger tent if the bedrooms are still 2 berth ones, look for a tent with 2 x 3 or 4 berth rooms, we've just spent 10 days in our 13 berth tent, the children had a 5 berth inner and had lots of room to keep away from one another to save arguments and me and OH had plenty of room for our airbed, clothes, junk etc in our 4 berth one. For a couple of nights you'd be fine with a small tent but for a fortnight something a bit more substantial is needed if your'e going to be cooped up together if it rains for example.
Keep the small one for weekends when it will take you less time to put it up and you don't need as much stuff!