Cocktail Attire.
Not unless specified. This is a largely an adult wedding with some teenagers welcome.
Parking is available at both hotels with cost. If you are local, consider taking a rideshare for parking (and celebrating) reasons.
The ceremony will be outside in a tent. The tent will be heated based on the weather.
If you are staying at Kimpton Hotel Monaco Philadelphia, there will be shuttle vans running all night. If you are staying at the Holiday Inn Express Inn Express, you are already at the venue!