When I book tickets or reservations, I usually try to book directly with the service provider. So I'm looking to purchase train tickets for September travel for Avignon, France to Nice from SNCF, if available. Now that's just over 6 months from now, so I know many tickets are not offered that far in advance. But SNCF is showing me a few trains, but only after 5:20 pm. Do they typically add more trains later? Additionally, the SNCF site tells me this: "Urban transport timetables may not be available more than 30 days in advance." 30 days? That seems a bit late.
On the other hand, Trainline is showing plenty of trains beginning early in the morning. So should I wait for SNCF to show more trains at some later date, or nail down a ticket through Trainline now? Does Trainline always show tickets long before SNCF? Any pros or cons I should be aware of?