I can see it’s missing toWhere‘s the chassis clamp lever? It’s missing??
If the nose weight is correct then you would be able to lift the front up by hand, chock up or then put steadies down.Many will disagree, but I would have considered using the front steadies doing a bit at a time each time until I am able to access the jockey wheel. However I would remove anything heavy from the front area including gas bottle.
We used our charcoal Weber for the genuine BBQ taste! Lamb chop, chicken & boerewors(Farmers sausage. LOL!
I feel your pain.......we bought our first caravan early last year ( newbies then and still are), and on our very first trip out I was using a motor mover to get it off the drive which has a slope - at the bottom of the drive there's a coping stone(not very high) and I watched in horror as the caravan came down it and the frame slipped down onto the jockey wheel......cos I had tightened it up enough for it not to slip on level ground, but not enough to cope with the drop...... luckily got away without damage but I won't be doing that again!! Hope you are back up and running again soon. Steve