While most of my big river FFing for smallies is during the time frame roughly from June to mid-November, bass in rivers can be succesfully targeted all year and the "pre-spawn" is among the best times, esp if you're after large fish. When water temps hit the mid 40s - this would usually coincide with mid March here in the southcentral - river smallies become noticeably more active and move up out of their winter hibernacula. These locations are usually the deepest part of a river, often the low, deep, slack water in front of dams. As bass become more active, they start to spread out a bit but still tend to eschew current. By this time of year, they start to feed quite a bit more but, unlike summer when most of the bass lay up in front of boulders and mid river structure and aggressively hit poppers - my experience has been that pre-spawn bass are shoreline denizens. In part, this is simply due to the higher, cloudier, water conditions so often prevalent in March and April. However, this preferance for specific shoreline locations makes locating pre-spawn river bass easier. When you find one, there's usually more in the same spot. Often these are large females staging to move to eventual spawning sites later in May (my preferance is to lay off big river bass during the spawn). If you've got a warm water river nearby, walk the bank during summer and familiarize yourself with the shape of the shoreline when the water is low and clear. Come high water, you'll know where to go. Perhaps the ideal pre-spawn location would be a point of land that projects out into the river, esp if there are large chunk rocks or boulders on it. Oftentimes there are river willows or vegetation that grows up on the point in summer but that often has water flowing thru it this time of year. If downstream from this point, there is an eddy (there almost always is) and the water is at least 3-4' deep, it's worth checking out. If the water in the eddy is very calm with little current or swirling action, and if there's flood timber debris along the shoreline of the eddy - it's a hotspot! Mouths of feeder creeks are usually good too. Most of the time, I like a 7 or 8WT fly rod with floating line and a 8-9' leader tapered to 12lb test or heavier. Despite smallies' reputation for being jumpers, in reality big smallies, esp in colder water, fight down and dirty and bore to the bottom. You'll need a stout tippet to keep 'em out of the woody debris and shoreline brush. During the months from about Nov until April, I prefer minnow imitating flies, the estimable Clouser Minnow is always dependable. For the (usually) cloudy water this time of year, black or chartruese/orange is tough to beat. Place a large strike indicator at the base of the leader. A "thingamabobber" would likely work well; I prefer the large, split, peg type bobbers you can get at the kids' fishing section at WalMart. Roll cast this rig out; you're aiming to get the fly to drop right at the outer edge of the eddy's slack water along the current break where the faster water is. This is where the bass are likely laid up during the pre-spawn. If the water is still very cold, the bass are probably on the bottom in the middle of the eddy but by April they're probably on the current break. Roll cast your rig and do a mental ten-count to allow your fly to sink. In effect, you're just fishing a jig under a bobber. The key is to keep your retrieve slow. The indicator will suspend your streamer in the zone. Smallies often scrutinize baits/flies very carefully, then suck 'em in and turn away. You'll see the turn when the indicator goes under (yeah, bobber fishin). Do a strip strike and fight the fish hard. While it's easy to get distracted by the prime trout fishing this time of year, don't give up on river smallies. They're definitely active now.