We are wanting to buy a train ticket from Dinan to Carhaix. It involves 3 sectors, Dinan to Lamballe by TER, Lamballe to Guingamp by TGV and Guingamp to Carhaix by TER. Do we need to reserve a ticket for our bikes when we make our bookings for us? If so, how do we do that? Is it any cheaper buying a ticket now for travel on 8th August? Or can we safely just wait until we get to Dinan? Because we have bikes, we are concerned there might be limited space available.