Sorry ... the flight information does not appear to be showing up in the public view. It has a link to the San Antonio Airport website. Most importantly, it advises you NOT to rent a vehicle until necessary ... such as on Saturday to drive out to the wedding. The Riverwalk area itself is within easy walking distance of the Woodfield Suites hotel.
Forgot to mention that the drive from the San Antonio Airport to downtown is only 15 minutes at the most. As such, taking a taxi to the hotel is a very good option. Otherwise, there are probably hotel or airport shuttles available as well.
Further transportation advice ... IF you will have to get to the various pre-wedding activities, you will probably want to rent a car upon arrival. There are many activities which are not necessarily within walking distance.
For others, I will find and hopefully post links to downtown car rental locations which one might wish to consider. The other option is to go back out to the airport so that one could return a rental vehicle upon departure from the weekend's festivities! There will be plenty of us with vehicles who could help you get back out to the airport to rent your cars ... and I, for one, would be happy to assist anyone in this situation.
For others, I will find and hopefully post links to downtown car rental locations which one might wish to consider. The other option is to go back out to the airport so that one could return a rental vehicle upon departure from the weekend's festivities! There will be plenty of us with vehicles who could help you get back out to the airport to rent your cars ... and I, for one, would be happy to assist anyone in this situation.