Where are you entering? If it is Pine Lake you'll be going through GM to Hoveland and up the Arrowhead Trail. You'll paddle up MacFarland which is outside the BW. You'll see some cabins on the north shore and a cool looking hill made out of shale on the south.
The portage can either be paddled or walked through. No portage needed.
Pine runs east-west and can be a real wind tunnel. That can make fishing tough. i haven't caught much there but some small smallmouth. I don't fish much though. Still, I never hear that Pine is much of a fishing lake.
Pine is probably best known for Johnson Falls on the west end of the lake.
When I've been to Pine, I've found the campsites nice though not particularly special. I'm not positive but I think all the campsites are on the north shore.
Pine is great for both fishing and camping. The Bays in both of the East and West ends of the Lake are good walleye fishing...and fish shorelines for Pike and Smallmouth. Make sure to make a stop at Johnson Falls...there is an entry through the woods on the West End, South side of Pine lake. It is amazing to stop in a take a dip in the cool waterfall! Any other questions, please feel free to ask!
"The best way to a fisherman's heart is through his fly."