I too have run gore all the way down to about 350 and think it is fun and worth doing. I have run the sneak and the meat lines in gore at this level. I think the sneak seems more dangerous than the meat at extremely low water. It has a rock that sticks out that could get you in the ribs if you ran it wrong. Overall though both are pretty easy at that level. The paddle in was surprisingly easy and I don't think we had to get out of our boats once. Tunnel is a little tricky and I think we all ran down the far river left side, which only had about 5 cfs going through it. The main channel looked pretty sticky. I had to push with my hands to get down it.
Current levels are great too. At 700 Tunnel can still be pretty sticky though if I remember correctly. A little more water and it gets flushier, but I think that 350-700 its at its stickiest.