Sawbill Lake Entry (not sure the number) is a very good entry point. It is an easy in an out, there is a nice campground at the entry point and there is a good outfitter there as well who can help if you have last minute concerns.

From the entry point, you have two very good options for travel.  If you head East, there is a short very open (easiest protage ever) to Alton Lake.  

If you head North there is a nice long paddle and relatively easy series of portages into Cherokee Lake.  Cherokee Lake would be a very nice place to base camp with several day trip opportunites.

Going into Cherokee may be just what you are looking for.  Hard enough to feel like you accomplished something (for a first timer), but not so hard that you won't want to go back.  When I take my wife for the first time...that may be my chosen entry point.

Good Luck and have fun!!!