I have been through SFO many times, and it is a good place for a first time trip. There is a good deal of United crap that goes through there, mainly 737s and 757s. A few 74s and a few 777s, but overall it's really heavily Shuttle dominated. There are some interesting sites to see there though.
To shoot through a chainlink, I use the following technique. Put the lens right up to the fence, use enough zoom to shoot the plane, and allow a bit of room on all sides for cropping (eg: If you normally shot at 200mm for a 737 taxi, I'd suggest 150mm or 135mm). This will allow the fence to show up in the corners and be easily cropped out during the scan. If this can't be done, I've also found a higher f stop will generally keep the fence partially hidden. Enough so, probably to get onto AN. The 35-70 is the lens of choice for that spot, and it should fit through the fence...Don't be afraid to use some brute strength to get it in the fence. Nikon makes TOUGH lenses/cameras.