I gave up on saddle packs a long time ago. Now I use this instead:
http://www.decathlon.co.uk/25-ltr-handlebar-bag-id_5994533.html
Much more flexible and convenient.
In it I carry a cable lock and a tool bottle (see link below), Gilet, OS map (if needed) keys, wallet, emergency bars+gel iphone spare tubes, spare batteries:
http://www.decathlon.co.uk/tool-carry-case-id_8123841.html
Inside the carry-case/bottle is:
Rema Touring P*ncture repair kit
Park quick patches
Topeak Hexus multitool with Chain splitter and tyre levers included
A VAR tyre lever .... one of the best pieces of kit ever invented
My Nitrate Spray (heart condition)
Spair chain links
Quick-links
Buff.
This might seem over the top but it functions well under most conditions and is readily removed from the bike. The bag is without doubt one of the best pieces of kit I ever bought.
Pumps, by a proper HP one and the longer the better. Piffling little pumps are not worth the bother. Look at the Topeak frame-fit designs:
http://www.topeak.com/products/Frame-Fit-Road