Absolutely, 8 hrs isn't going to be reasonable and I don't think anyone would expect you to do it.
And at the moment when supply is restricted, which means that for some people the soonest appointments are that far away, those running the system know people won't book now but keep checking back until it is reasonable and manageable. Some people will be happy to book when it will take 2 hours each way and some when it's an hour.
And of course it varies geographically. Some people when they first looked found appointments within 2 hrs or 1 hr and when they looked again coukd see them 30 mins away.
Perhaps it would help if a message went out saying that because supply for 1st jabs is low, people might need to expect to wait longer to find appointments that work for them. I think they want to limit the messaging though as the more message snet out the more confused people get.
I guess one thing that does happen, is that if people look and see the kind of journey you saw Dances, that although they aren't prepared to book it, it increases their awareness that a journey is likely to be needed and when the venue that will take 90 mins each way comes up, they are perhaps more willing to book it and indeed keen to get get it.
Supply for 1st jabs is so limited, it really does become a case of rationing by distance or time doesn't it. Essentially there isn't enough supply for everyone who wants the jab at the moment. It just isn't practical to offer it locally to everyone when supply is so low, so you either rollout much more slowly (and that reduces the pool of people who can travel to the centres and make it less efficient again) or offer it to a wide group of ages and offer what's available and let them decide if they want to go and get it. And before a cohort can be signed off and the next moved onto, the gov will need reassurances that efforts have been made to follow up those who didn't book, and one way to do that will be to offer those who haven't the few more local appointments and to use the drop in centres and buses etc. But lots of people are now travelling distances of an hour or two, because that's the way to get the jab and they want it.
In an ideal world supply would be sufficient to enable everyone to have the jab within half an hour of 45 mins.
So I agree what's available to you isn't realistic and no-one would imagine hardly anyone would book those slots, but others from other directions will be nearer those venues than you are, and they will. But there's a gap in lots of people's minds between the reality of journeys required and what might have been needed 2 months ago. 2 months ago. Lots of 1st jab people could walk 5 mins or drive to the centre in their town for an appointment and lots of phase 2 people imagine that's still the case. They think if they wait, everyone can have that local appointment but don't realise the supply just isn't there now and lots of local centres have stopped doing 1st jabs, so most people are having to go 30 mins or an hour or a bit longer, if they aren't to wait for the mop up which could be weeks off. I can see why people are rather surprised and a bit cross to see an 8 hr journey offered, and then to need to look multiple times before they find a resonable journey, which is still an hour away, when in their mind they'd be going to a centre in their town. Expectations and supply aren't quite in line.
Hope you find somewhere suitable soon.