h is on the liveHi Jayoh
1st;- Electricity in this country we only switch the live feed but on the continent they switch both the live and neutral, so UK electrical equipment may if faulty, and you can't programme faults developing, be a hazard. So we Brit's have to ensure that our switch is on the live wire. You will need to obtain a means of establishing if the feed from the E/L post is reversed, most people have a simple plug in device, camping/caravan shops certainly have them.
To cope with a line reversal I,like many others make up a short length of cable with a three pin round socket at one end and a similar plug at the other, the positive and negative conductors at one end you terminate reversed (+ to -ve and -ve to +). Mark this connection cable in a very clear fashion.
Do not be misled in to thinking that the UK style sockets that you will increasingly find on the continent are correctly wired, this can't be taken for granted.
You might be advised to take two leads as sometimes the power post is more than one length away.
You will also find that two plug outlets are still common so you need to purchase a lead that will convert two to three pin connection, once again the camping/caravan shop will have this.
Water is no problem, the continental pitches very often have taps on the pitch or very close. Your main puzzle will be where to dispose of the waste water, you will have to ask of watch where others get rid of it. A lot of site owners like you to water the greenery.
The elsan can also cause some head scratching, once again ask or watch, you may well find that you use a specific toilet.
With regards insurance you will in all probability have to take out seperate cover, personally I use the Caravan Club Red Pennant multi trip, the Camping and Caravanning Club have a similar scheme.
A word of caution especially if you are the only driver, the French police take your driving licence away on the spot if you are caught driving well over the limit!!!
Finally enjoy yourself, everyone invariably say's I don't know what all thje fuss is about.