I don't think you will have any issues. Max tow only really adds a cooling circuit for the battery... The battery management will limit the output if necessary to protect the battery, so you will be fine.
I would have no problem towing the trailer. I have done quite a bit of towing with SR Pro. Full Frame and 6K base weight, it tows like a dream. Incredible generation on the down hills. Since you are on vacation, you will be in the right lane going slow to conserve battery since wind loss is...