Dorset on Saturday - Best Route Advice.

[GreatGranny]

Live just outside Sleaford and travelling down to Swanage area on Saturday for a week.
Never been before so unsure on best route.
I will be towing so just need the quickest/less conjested route.

Route on Google has 3 options:

1. A1 A421 M1 M25 M3
2. A1 A43 A34 M3
3. A1 A46 M69 A46 A34 M3

Route is the quickest by 10 mins and least distance, 2 & 3 meant to be the same.

Whats the M25 like on that stretch? Used to do it years ago when M in L lived in Aldershot and it was hit and miss.

Planning on leaving at about 7am so should hit M25 around 10am with a stop.

Thanks for reading

[GreatGranny]

Thanks for all suggestions and advice.

We are actually attending Camp Bestival on Sunday. Our caravan site is approx. 10 min drive from Lulworth.

Hopefully traffic for the festival will have peaked a few hours earlier by the time we get down there.
Realise it will be bad whatever route we choose but think A1/M1-M25-M3 is favourite.

Planning on leaving at about 7am which was met with shocked faces by my 12 & 15 year old daughters :-) My 8 year old son just shrugged his shoulders.

Just got to start packing now :-)