Phone the very nice people at this place:
https://www.justticketsandmotoring.co.uk
And tell them what you’d ideally like re. Type of campsite. You may find that the nicest campsites are now sold out though and accommodation other than camping may also be difficult to get.
Also think about what sort of ticket you want. General access is v good value, but you’ll be crowded for the start and end of the race wherever you go.
I’d suggest a grandstand ticket looking down over the pits, gives you somewhere to go at any time in the race and very handy if it happens to rain.
Make sure you make time to visit the Museum in the circuit as well.
If you are not in a rush, travel home on monday, rather than sunday evening.
Enjoy!