Please note there are so many different hotels to stay at in the Austin/Round Rock area. If these both get booked up, or if you prefer another, stay where you please.
If you are coming in a group, consider Airbnb!
House Or Rental
SpringHill Suites by Marriott Austin Round Rock
2960 Hoppe Trail Round Rock, TX 78681 (512) 733-6700
Mention you are apart of the Frey/Allen Wedding
Hotel
La Quinta Inn & Suites by Wyndham Round Rock East
3900 East Palm Valley Boulevard Round Rock, TX 78665 (737) 346-6652
Mention you are apart of the Frey/Allen Wedding
Flight
Austin Bergstrom International Airport
Uber will be the most convenient way to get from Austin to Round Rock. Or renting a car in advance.