Let me tell you the best way to get involved with other chapters....this site itself! See if there are sisters among your area on this board. Set up a place and time (like the mall for shopping or for lunch) between the two (or more) of you, and compare schedules. Then, take the idea back to your chapter and set up future sisterhood events together. That's what my chapter did with the Gamma Pi ladies of UMBC. I am now best of friends with majority of these ladies, and both of our chapters are incredibly comfortable with each other when we see each other at random places. It might sound simple and dumb, but it works so well
And if the chapters really like each other, consider setting up socials with the same fraternities. Just my $0.02. Have a GREAT weekend.