At particular risk of getting hot are connections and connectors.
I am quite surprised at the apparent lack of concern over this issue from some here. I have seen plugs melt completely when charging on a 13A socket! 6A will be better and should be OK if the caravan is new but my fear is that people may read some of the blase comments suggesting all will be well and then go and plug into an old caravan with old wiring and loose connections. It doesn't bear thinking about.
I am sure that we consideration of the risks and sensible care all will be well
My father , who is an old school electrical engineer (working from substations, to HV Lines, to industrial plants), and I were discussing this recently. He had been called in for some advice at one particular factory (an electro plating firm) where they had regular metal clad surface mount sockets around the place which subsequently powered a number of movable immersion heater units they used to heat the chemical baths.
Similar problem to EV charging, i.e. long periods of high current, resulted in the plug tops melting. High quality plugtops lasted longer, but cheapo ones soon melted.
Rather than replace all the sockets with Commandos, (each with an MCB to retain localised overcurrent protection), the cost effective solution was to solder the fuses into the plugs!
The resistance between the fuse and the fuse carrier in cheap plugs was such that it caused significant heat build up.