I carry a few empty bags that I could use for sand bags too, in case I can't use the auger. But I'm not going to lug the sand or shot for them. If indoors I'd either go the sandbag route or clamp the stand to something. I have a telescoping extension with a clamp on both ends that can make a strong horizontal connection to a rail, seat, another stand, etc. That can also come in handy to connect two stands to make passing between them much less attractive.