It really depends on what you are trying to listen to vs. how well you can receive the each tower you want to listen to.
This is a wonderful website that explains the "affiliations" of each talk-group to each tower. (meaning which towers are programmed to "listen" to which TG) Not sure if you will be able to access everything from that site, as it is now gone and can only be found at an internet archive site.
MN Metroscan Homepage
Being as you're in the Anoka system area, if it were me, I would program in site 1-002.
From there, you might try sites 1-001, 1-006, 1-009, 2-001 & 2-003. You may get traffic from these and you may be too far away. Hard to say until you try.
You may hear anywhere from a few, some or many of the TGs from the secondary sites I listed on your "home" system, the Anoka site 1-002. Easiest way to find that out is to "search" for TGs on that site vs. "scan" the TGs you've programmed.
Hope this helps.
MM