I have done Jerez quite a few times now (my aviator pic is there) and catalunia a few times. I personaly am not keen on useing Focused events for european trips, as i, and others i know have had damage to our bikes in transit. It is only bikes with track bodywork, but i was not impressed to find my bike had had a tyre straped so tight over the seat unit that it left the impression of the print in my paint! And it wont t-cut out. Also it cracked the fibre glass as i have a cut down subframe, so the rear section has no support. I did get a free track day out of them for the damage, but thats not the point. We were asked to provide bike covers, which we did, but obviously not used. When we got to Jerez, My bike was on someone elses stand, so had to prop bike against a wall, then search for my stand. Then all the covers were thrown in a heap, and when i found mine it was ripped! My mate did'nt even find his, and they had to supply him with a new one.
The moral of this story is to use TRACK SENSE. They are great. Took bikes to Kemble airfield, Glostershire (or they pick them up for you at extra cost) and the bikes are straped into steel frames. You then strap your kit bag with leathers, boots, back protector, etc to your bike. Also stands, tool bag, spare tyres etc will all fit within this frame. They then put one frame on top of another one, and then fork lift the two bikes onto a curtain sided lorry. When you get to the track, each frame is lifted off the lorry, and only you unload your bike, so no damage, and all your kit is in one place.
As for power, take european adaptors, and the blue 16A round sockets, plus ext. lead, etc. Most tracks i've been to will have both types available.
Carry your helmet as hand luggage, much safer.
As for tools, depends how much you can do to your bike really. I take sockets, torque wrench, allen sockets, lock wire and plyers, screwdrivers, tiewraps, laytex gloves, rags, tyre pressure guague, etc. The organisers usually take most tools with them as well.
As for spares, take brake pads unless they are new on the bike. Take spare levers and thats about it. I take spare handle bar tube, footpegs, throttle cables (i have quick action throttle), wets on rims, plus a spare rear slick (a bit cheaper to buy in the uk than at track event)
Hope that lot helps anyone thinking on doing a european track event. You will love it on a hot track, and dont forget to drink water ALL day, you will sweat alot!!
Cheers Rob.