Undergraduate research opportunities LACs vs National Universities

Would you mind clarifying this for me? You advise going to the larger school (larger than presumably the LAC), which is totally fine, but your caveat is that the research (where?) was so great so, again presumably, you don’t want to miss it. Are you saying the research was more readily available at the smaller school?

Asked another way, attending which type of school exactly presents the risk of missing out on research?