Best recommendation would be to find kayakers or other rafters that would be willing to stick with you to show you the lines. If that isn't possible, do as much research as possible (video showing kayak lines and naming rapids:
) and come prepared.
My advice if you are running in one boat:
1) Gear: multiple throw ropes if you have extra paddlers to set up safety on a couple of the bigger drops; patch kit (the blast rock is extremely sharp); all paddlers come prepared clothing-wise for a strong chance of swimming
2) Applesauce is the first big drop, not that big of a deal for a raft, but stay right to avoid the center rock pile, it is a serious pin risk for kayakers
3) I'd strongly recommend portaging the entrance to Gore Rapid. It is a very difficult line that if it were to go wrong, could send swimmers down as far as below Pyrite through some very serious shit. That being said, in your process of portaging (discreetly along the railroad tracks on RR), you can scout the next quarter mile of class 4+ drops down to Pyrite.
4) After Pyrite is a good bit of read and run class 4 stuff, then pull over on RR to scout Tunnel. Have one of your extra paddlers set up safety in the pool below Tunnel, as you have a more than 50% chance of flipping in a small boat no matter the line. Self rescue below Tunnel is usually easy, but a swimmer does have a chance of getting stuck in the falls recirculation.
5) Set up safety below Toilet Bowl, it is a very dangerous recirculating drop that has and will trap rafts (and swimmers) for a loooong time
6) While it is relatively easy to read and run (the line is generally on the right, occasionally following the main flow to the center), do not fuck up in Kirshbaum. That would be a very long unpleasant swim.
Gore is an extremely inhospitable place if you are out of your boat. People have died there both swimming and walking on the rocks along the shore. It is far and away safer to go with a good crew who can show you the lines and set up safety, but if you choose to go at it alone, god speed and good luck.