@DubaiismyBlackpool - Thanks for your response, sounds positive.
We already own the Caravan and have been on the park since April, the Caravan itself is only 2 years old, we have electric panel heating which are pointless so we have oil filled electric heaters which are so good. 20 years is the age of the caravans they like them to be, however, if your caravan is in good condition they are happy for you to keep it on they're longer.
Of course I really want to do it but my main concern is my 7 yr old DS having to endure early morning getups as we are approx a 50 minute drive from School/Work. I wouldn't change his school as some suggested because I'd be working where I work and my Son will be in a school local to the caravan park which isn't ideal if he was to become ill and had to be picked up - Our solution is to stay at the in-laws (where we live now) for two days a week to reduce the pressure of 5x early morning get-ups and I will reduce my hours 2x days a week so we are back at the park at a reasonable time. DH will also change his hrs 1 day a week too to start later so DS will only have to endure 2x early morning get-ups.
We also would have to vacate mid-december until mid-feb so then we had the worry of where do we go, however, we know for certain we can come back to where we are living now - Our solution is to come back to where we live now for 7 weeks.
Then we had the worry of not having a legal residency where we pay council tax. We currently pay council and tax and rent in the house we live in with our in-laws and because we are not wanting to live in our caravan to save money, we have decided we will continue to pay the rent and council which means we are not doing anything illegal and its still classed as our permanent residency.
In terms of washing/drying - I do our own washing anyway which is about 4-6 loads each week, of course we know that launderettes aren't cheap so the two days a week we go back to in-laws I'll do our washing then.
We currently pay an amount each month towards bills so we'd still continue to pay some money towards the cost of us staying over 2x a week and using the washer/dryer...we only intend to reduce this amount by £50-£70 so they are not losing out really.
We've also looked at insulation for the van which we will invest in.
So basically, we'll be living in our caravan for 5x nights and staying at the in-laws (or our 2nd home) 2x nights. We currently spend 2x nights at the caravan and 5x nights at home but having 6x adults and 2x children is becoming quite depressing and stressful.