well you could try taking the spare wheel off and putting in in said caravan (cheap option) or if you have an alko hitch as i guess you may have a look at AKS2004/3004 4x4 Adapter Handle Stabiliser Hitches Caravan Stabilisers Caravan Towing Equipment Caravannin... as this may solve your problem
Found a bit of a problem when trying to connect my Coachman caravan up to our Freelander 1.
The friction lever on the caravan which has to be upright when hitching up fouls on the spare wheel.
Appreciate any ideas on how to get around this ?