I've found that there is a lot of un-used space all over a Speedster (and Spyder, too!) that can be creatively used to store stuff out of sight.
What I've also found as I get older and since you seldom use this stuff and usually on other people's cars, is that I forget what is in there and where I put it, so one of my tasks before Carlisle is to inventory what's there and where it is so I can find it in a hurry. I'll make up a list, stow it in a ziplock bag and pop it into one of the tool bags.
BTW: In Pearl, one of those bags also carries (since I looked in there last night) the remote for my stereo/IPOD, a dip stick thermometer, my carburetor synchronizer tool, two FRS/GRS walkie talkies and their charger, one VOX headset for the walkie talkies, a corkscrew, several dual velcro strips, several sets of ear plugs, Kathy's special "wind-block" sunglasses, a couple of micro-fibre cloths, my extra fuses, my stoplight finder prism, a couple of pens and an extra leash for the Jacks. The bag is about 16"L X 7"W X 7"T and there's still a lot of room left and it tucks out of sight behind the passenger seat.
For tools, I took as an example an old Porsche 356 tool kit and simply duplicated everything using modern equivalents. 1 multi-tip screwdriver takes the place of three regular ones, a single adjustable wrench will suffice, a leatherman tool is indispensible, etc. The only "special" tool I have is a 19mm bolt made into a 3/8" socket drive so I can use my lug wrench for other things (like spark plugs).
Get some soft-sided tool carry bags at Home Depot, Lowe's or Sears/K-Mart and stow stuff in them. You can fit a LOT and they don't take up much space. I'll try to find an old picture of my spare part caddy sitting in my spare tire/wheel and post it here, too. THAT holds a whole lot of stuff.....
Kathy keeps telling me that she could make up a custom caddy for everything so it would all be in one place, but I'm just afraid that it would become too big to fit anywhere conveniently. Maybe this inventory exercise will help organize everything so that might be able to happen.
Here is my Road Spares holder sitting in my spare tire/wheel. It's a Rubbermaid picnic condiment container made for chips and dip and it fits a 16" wheel (back side) perfectly. I popped a hole through the middle and use the spare tire hold-down bolt to keep everything together:
http://i49.photobucket.com/albums/f254/speedster356/RoadSparesHolder.jpg
And here it is with the lid off:
http://i49.photobucket.com/albums/f254/speedster356/SparesOpened.jpg
Those photos are from 2004 - there's now more stuff in there and a little better organized, but you get the idea.
gn