You will be able to claim your mileage to his new residence, food on the way there and one night stay in a hotel. Just be sure that you keep all receipts.  

Moving expenses

Thanks for your reply - much appreciated! Just wondering if you could explain the logic behind your reply? You indicated 1 night's accommodation. We were required to spend 2 nights in a motel before his new accommodations became available. You indicated mileage, even though we rented a vehicle. You mentioned food on the way there and to keep receipts. We have the receipts for accommodations, CRA accepts a simplified claim(without receipts) of $51/day for meals. How many people can claim the meal expense?

I figured that mileage, one way, at the rate of .57 for Ontario(not the vehicle rental), motel accommodations for 2 nights (until new residence became available) and meals for 3 days @ $51/day(may son only) would be a reasonable claim. That would be $171 for mileage + $180 for motel + $153 for meals totaling $504. This is far less than the actual cost, but, I'm just trying to be fair based on what he's rightfully entitled. Please show me were I might be mislead.

Those were examples and then I sent you the FAQ to assist you further.

Here is information from CRA on everything you can claim as expenses if your son is a full-time student.