Very little traffic in your area is WyoLink, so you are going to need a bit more antenna for sure. The Sheriff has 3 or 4 repeaters, of which only 1 or 2 can be heard from Douglas with normal antennas. I believe the closest WyoLink tower to you is ViHi and when I travel to the area, I hear a lot of WHP traffic on it.
If you can't hang anything on the walls or drill holes, you may have some problems. To get an antenna that works on VHF, takes up more area.
You can make a roll up J-pole from plans on the internet. This could be held to the wall or from the ceiling with a thumbtack and easily taken down. I have also seen folks make these from copper tape and stick them to windows.
Or if you have a suspended ceiling, you can move a tile aside and hide an antenna in there.
Most all the stuff to listen to in Converse county is hard to hear in Douglas due to it's physical location. Getting a better antenna up will certainly let you hear more.
WM