Mille Lac's has been on FIRE recently....Very good success in 25-30fow, mud flats in the AM and gravel bars in the evening. Most everything is working right now, lead core and cranks (Reef Runners), snell rigs with crawlers or leeches. Slip bobbers over the gravel or any rocky structure in the PM. Be safe as it's a big lake and it's not uncommon for 5ft rollers to come up quick...watch the weather...good luck and tight lines!!
Also, don't know if your bringing a boat up or not but there are some new regs for Minn this year...pull your drain plug immediately after leaing the water. $200 fine for not draining your boat and they will pull you over if your plug is in your boat...state wide! New slot for Mille Lac too...must relaease ALL fish between 17-28" with possession of 1 over 28"
P.S. Thanks for the tips Nik...those GSP marks are spot on for some nice fish!