"In these last 50 days even the SNP campaigners seem bored"
I think there is some truth in that.
"Wonder if the poster campaign is about to heat up? Billboards etc?"
Almost certainly true - and it's likely to be a (n almost) complete waste of money in terms of persuading anyone.
On Radio 4 this morning (Broadcasting House - coming from a tent in Glasgow) I heard someone say what I have said on here before (they were discussing 'switching') 'some people will switch/decide when they see the ballot paper'.
Perhaps the most surprising thing of the hour was after the presenter asking if people in the audience had registered to vote, most said aye, then he asked how many had changed their opinion on how they were going to vote - silence!
I think there is a general belief that the 'undecideds' hold the key, and some evidence that they are more likely to vote Yes - but there don't seem to be enough for Yes to be over 50%.
"Something dramatic needs to happen to change what appears to be inevitable (although I'd say it's not so inevitable that I haven't hedged my bets to at least get my stake back)."
Is that by a pollster or a politician?!!