travel arrangements/expenses/reimbursement all need to be hashed out ahead of the meeting.......communicate!.....if he doesn't mention it, ask and come to an agreement........
if a dude is outcall only and doesn't mention it at all in any ad text or pre-meet communication, you can probably assume he's got it covered......if you're staying at a valet-only, $80/day//$25/hour for parking hotel, you may want to bring the subject up if he's driving himself there!!!
I always try to cover parking/valet if I know the guy drove himself there and parked at the hotel......if he's cool and all worked well, I'll add an extra "tip" for his gas and drive time (in addition to a regular "tip"), though it was his choice to make it an outcall