You can do it in the garage using a plumb bob. The bike needs to be upright on its wheels not a stand. Use the plumb bob to mark the point on the floor then measure them. Do keep in mind factory specs will vary slightly and different rear suspension will have an effect on the measurements.
Rake you can get easily on level ground using this:
WESTWARD Magnetic Digital Protractor,2.165 In - 2YNK6|2YNK6 - Grainger
These are the pertinent items
The most important thing, get the front end up, tug, pull, twist, push, try every direction make sure there's no clunking etc. luckily the R3 front end is rediculously stout and if she was going slow chances are your bikes sound. Make sure you replace everything damaged or potentially damaged, my check for similar was about $4500 from insurance.
All the pertinent dimensions:
5.8" Trail
32 degree Rake
66.7" Wheelbase