that's about all of it. I'm not sure if the IRS will want more evidence other than my log. Also i'm not sure how to provide the IRS with my log information, I'm trying to use an efile site and it had me enter vehicle information and the mileage I claim but didn't have me enter any evidence.
Yes, you have enough evidence. The evidence that the IRS require is a mileage log, whether copies of the one from the IRS website, one made, electronically or one bought in a store. As long as you have the following as evidence it should be enough to prove your mileage claim.
Date of trip
Business Purpose of trip
Miles for trip
Odometer readings (before you begin the trip and at the end)
Also, if you review IRS Publication linked here, you will find a sample of the log at the end of the publication. This should help guide you as to what you will need to prove mileage. For more information, please read the following article on Business Use of Vehicles.
You will not have to turn in this evidence or record it in your return. You, however, will need to keep this record for three years after the filing of your return in event the IRS do require to see it.
Great news! You have just the right amount of information. Remember you don't actually need to submit your log unless you are audited by the IRS. You only need to have record of your mileage on hand in case you are requested for more information during an audit.