What kind of management do you run? I would opt for a base map first before doing any kind of driving let alone a 90 mile journey untuned, this will be a very quick way to ruin your engine. If you decide to drive 90 miles to your tuner you need to first confirm that your off boost, part throttle driving is catered for and i would forget about coming on boost! Safest option would be to take the car on a flatbed or someone with a recovery truck to transport your car to the tuner.