I always bring 4-6 depending on the situations when I fish as a non-boater. I usually have a jerkbait/crankbait rod with 10-12lb fluoro, a spinning rod with 8lb fluoro, a jig rod with 20lb fluoro, a (sometimes two) 7' MH casting rods with 15lb fluoro or 65lb braid for traps, jigs, spinnerbaits, topwater, texas rigs, and squarebills, and a 8' H flipping stick with 65lb braid (Dobyns 805), which is my favorite rod and always a must have.
Sometimes, I'll have more crankbait rods, flipping sticks, spinning rods, etc depending on the situation or time of year. I rarely fish draw tournaments, so when I fish as a backseater it's as a partner and I usually know the plan for the tournament in advance.