Mousy wait till November to plant the tulips. I think you're ok to go ahead with the hyacinths though.
We spent the weekend in Dorset. Visited two gardens; Kingston Lacy and Compton Acres. The former had a harvest festival on and was showing off its kitchen gardens, together with apple bobbing, conker championships, guess the weight of the pig etc. lots of pigs there, in fact. I badly want a pig. A kune kune to live in the orchard. Dh is having none of it though. 
The highlight of the gardens there was the fernery. Beautifully done in a woody dell, with twisty turny paths and pretty corners, and lots of stone seating where I would have liked to have sat and mused, and enjoyed the atmosphere. Not possible with small children in tow of course.
Compton Acres is an early twentieth century garden, and felt very modern in comparison. Beautiful planting in the woodland areas with some fabulously big-leaved rhododendrons - sinogrande and falconeri which I may have to copy in my north facing border. Excellent plant shop there too. And cakes.