Spare wheel

Having jacked mine up on my driveway it is not for "the aged, infirm and those of a nervous disposition". Not sure about No2 but 1 and 3, most definitely.

I agree that a sealant kit is not insurance enough especially for longer trips. We had a puncture in a car that only has sealant , it didn't work and the only thing a breakdown service can do is tow your ca to a garage.

Our MH came without a spare,  so I bought one with a part used tyre from our local breakers, £30 and they double checked it was correct size. Keep it in the van garage.

Also carry a Draper airbag jack which fills off the exhaust, excellent on soft ground and back up to the supplied jack.