Hi. I've never been to either, but now I have English Heritage membership I've decided I need to get around to going. It makes sense to do both in one day (via the Stonehenge bus), but I'm coming from Kent and won't be able to get to Salisbury until at least 10:42 am, without getting up at silly o'clock in the morning (I'd have to catch a train at 7:33 as it is). I notice from tomorrow the closing time of Old Sarum is 5 pm, do you think I'd have enough time to do both in day? Bearing in mind that I'm someone who likes to spend the maximum amount of time at these places, and take in all the information about them that's available.
It would be a bit better if the bus called at Old Sarum first, because Stonehenge closes later, but it calls there on the way back to Salisbury.
So what do you think? Possible at this time of year, or should I leave it until next year when the closing time is put back again?