Hi and welcome Beckboo!
If it were me I would:
1) Position on slabs to keep grass & weeds etc. growing up underneath. This will also help with air-ration underneath the caravan and help protect against damp etc.
2) Consider removing the wheels and using storage stands. Alternatively you can get tyre savers -
https://www.amazon.co.uk/MSA-TYRE-WHEEL-SAVERS-HANDLES/dp/B07KMGY255 3) Electric supply. I think you will appreciate a mains feed. Some form of heat may be required in winter. You may want a cuppa (of something), some lighting, phone charging etc.
4) Prepare for bad weather. Might be fine and dry when you go out but horribly wet / cold when you go back indoors. If nothing else a simple large umbrella :)