Need to hire a car-ideally a seven seater from Merignac airport in June. V tempted to hire a van like an Opel Vivaro to make sure we have enough luggage space (family of 2 adults + 4 children). Any experience anyone? It's 9 years subvert I've hired a car abroad. Was intending to put my 129cm, 26.6kg 9yo & my 102cm 18.1 kg 4yo in Trunki Boostapaks & take my 3yo's Britaxcarseat. 11 yo ok with just a seat belt. Sound ok?