Most parcs will offer internet access on parc for their guests - please check the 'Facilities and Amenities' section on the parc pages to see if yours does - but there may be a cost for this payable locally to the parc, check with the reps on arrival.
We don't generally provide dedicated Wi-Fi in the accommodation but there are some Premium Exclusive units that come with Wi-Fi.
Since June 2017 new EU legislation came into force which will mean that you should pay the same prices for using your mobile in the EU as you do at home - check with your mobile provider to see which regions are included and what your allowances are. This usually includes data and any free data included in your package, making it easier and cheaper to use your mobile as a wireless hotspot for your family if you wish.