Motorsport IT solutions, likely wireless

I am looking for suggestions on the most appropriate solutions to several IT problems that turn up in motorsport, likely solved with short/medium range wireless transmission. To be clear I am not looking at the problem of live telemetry from the race car, but instead all of the other data handling tasks among the team. Chief problem: Pit wall, garage and data truck tend to be physically separate areas where wired connections would either be too cumbersome to install temporarily or physically impossible. Present solutions of consumer grade WiFi performs poorly if at all, likely due to the interference from cars, other teams, broadcast, high voltages etc. The solution I have in mind involves directional antennae between the three locations, however I can only see solutions that are based on USB dongles and other pretty cludge solutions. What exists that would essentially take a wired router connection, fire it wirelessly through some directional antennas to another that it is configured to work with? How complicated or delicate is the setup? How weather sensitive would it be? We do have to put up with some pretty awful wind and rain.

Ideally you guys could poke some pertinent questions and we could work toward the best sounding solution.