My husband and I want to take the train from Bristol Temple Meads to Wareham in mid-September, on a weekday. There is no direct train and we will need to connect either in Dorchester or in Southampton. I am a Britrail newbie and I have a number of questions about this journey:
(1) Is it better to connect in Dorchester or in Southampton? It looks like in Dorchester we would need to change stations, whereas in Southampton we will only need to change platforms, so I feel a small preference for Southampton. Travel time and costs are both comparable.
(2) I'm looking for tickets in mid-September and GWR says the advance fares are sold out on the train we want to take...is this really possible? Or do they have a quota per day, so should I just wait another day or two? Or more? How soon should I buy this ticket?
(3) It is much cheaper if I buy separate tickets Bristol-X, and X-Wareham, where X could be either Dorchester or Southampton, instead of one ticket Bristol-Wareham (split ticketing). But if I do that, what happens if the Bristol-X train is delayed? Would we need to buy new tickets for X-Wareham or would our old tickets be valid on the next train, which is what would have happened if we were traveling on a Bristol-Wareham ticket?
(4) Should I buy the Bristol-X ticket on GWR and X-Wareham on SWR as they are operated by these different operators?
(5) Should we reserve seats? How does one reserve seats? I played with the GWR website and it was not immediately apparent to me how that works.
Thank you very much for your help!
P.S. We are not buying the two-together railcard as we are not traveling enough by rail to make it worthwhile.