I was told to do the same - go and ask on the morning. I went in and I was then told that they cannot take requests anymore as they get so many

.
I think it does no harm to ask but I don't really think they take any notice of it tbh. It's a case of timing really.
Having said that, if you are going midweek I think you stand a very good chance as it won't be so busy. One tip, try and get your reservation in nice and early before the start of the parade - like a good half hour or so before (even more) before - doesn't matter if you are eating when it passes - at least you will have your seat.
As it happens in June, because we waited almost 50 minutes for our reservation (DH was not a happy bunny

), we ended up with a table for the parade. But only because once we were seated (at the back of the restaurant in FL room), I went for a wander to see if there were any window tables. Someone had just left and the table was empty. I approached the Manager and asked if we could move due to the fact I had asked twice (once on the telephone, and once on the morning) and that we had waited 50 mins with young children for our very late reservation. The manager did sigh but let us move - the parade was just coming down Main St when we were seated

.
I was amazed at the people around us though - a couple behind us barely looked out of the window the whole time! And another family (3 children), the mother kept telling the children to sit down and get on with their meal, which they did

! What is the point of giving those people window tables when clearly they aren't bothered - I doubt very much they even asked for them given their reactions

. I know not everyone gets super excited but at least I would have expected them to wave at some characters and look out of the window

.
Hope you get your table

.