I am unsure which features would be inclusive of trills, any information is greatly appreciated! Also, if anyone knows of a feature chart online that includes trills and could link to it that would be great.
There is no standard answer, though there is a correct one (I daresay). Trills are voiced sonorants but they have to be distinguished from glides and nasals. Their value for [continuant] depends on how exactly you define/diagnose that feature -- the issue is that trills are "intermittent stops", so there is some oral airflow (but there is a complete oral constriction). "Voiced oral sonorant stop" would identify the trills, and trilliness would be a consequence of the minimal vocal tract constriction, which is necessitated by the feature [+sonorant]. Essentially, the constriction is so loose that it is temporarily blown open by the increasing air pressure (and the cycle repeats). The only other candidate for "voiced oral sonorant stop" would be [ɾ], so this analysis might not work if the language has [ɾ] and it can be shown that the segment is a sonorant and a stop.
[Edit] Bearing on mind the observations in the comments, and upon reflection, voicing is not an essential feature of trills, just of the trills listed in the question.