Children of this age, may possibly be already toilet trained so perhaps you'll not have to take nappies or pull ups. If so, that makes travelling a whole lot simpler. For ongoing daily driving with overnight stops, sleeping in swags is a great option but don't attempt this with young
toddlers until they are confidently toilet trained. Booster seats can normally be used in place of the larger, 0-4 car seat
however for long driving trips the added comfort, padding and support particularly for sleeping is a good reason to keep using it a little longer. Your child will also enjoy the higher sitting position in the vehicle, so stick with it at this age if you can.
In the lead up to a big trip, start collecting special things for your young
child that will be a novelty (new books, a whistle, a torch), and allow one favourite teddy for the trip. Talking is this age groups favourite pastime so car time will probably be spent talking, answering endless questions and playing simple car games. Toys, games and activities can be kept in a box for use only at camp.
No parent has all the answers, but if you put in the ground work your child will naturally love the whole camping and travelling experience so fingers crossed for a enjoyable trip.