I like being in groups with multiple packs/groups. I just find it more fun, especially if they're rivals.
It really depends for me, but I tend to lean towards multiple groups. It just helps with plot development and can lead to some interesting battle roleplays (if rivaled). I also like the ideas of meetings and counsels. Of course, if it's a super good pride against the evil savage kill-on-sight hyenas, then maybe it could spiral a bit out of control.
On the other hand, single packs can be quite enjoyable in a pioneer or explorer type scenario. Though the plot may advance slower, there could be some interesting twists with the splitting of the group or a tyrannical new leader.