The area surrounding Camp Bullis is all newly developed (<10 years). You are not going to find any bad motels if you stay close. Off the top of my head, there are a brand new Residence Inn by Marriott and Drury Hotel at the Rim shopping center west of Bullis at I-10 and FM 1604. East of Bullis there is a new La Quinta and Homewood Suites near Costco at FM 1604 & US 281. What I would recommend, though, is to see if the Westin La Cantera Resort or the JW Marriot Hill Country Resort & Spa have any rooms at the military per diem rate.