Real Smallmouth Question

Today was the first time I fished lake erie for smallmouth from a boat. I did a ton of research before I went out. My plan was to use tubes, drop-shot worms and deep diving crankbaits. I was targeting structure and points in 5-15 feet of water. All I got with the tubes and drop-shot was a ton of snags and no fish. I used just enough weight to keep it near the bottom. I got a bunch of fish on the crankbaits but I was very dissapointed with the other rigs after reading so much about them and how well they work. Lets hear some ideas on what I should try to do it better for nest time.

You may want to go and purchase some blade baits,.Read the fishing report from the Georgia-Ohio guys.I have always had luck on them,just go buy a couple of each different brands and give it a shot in some deeper water around 15-35 feet.I am planning a trip during next week and am going to use same stuff.Some guys use just silver ones and some gold only,but I use both depending on what they hitting with the conditions for the day.

I was there yesterday and didn't catch squat. But of the four hours I fished, I spent 1/2 my time fishing the 20 to 25 ft depth. That's where I ussually catch them this time of year. I did spend a couple hours jigging in shallower water but that didn't yield anything either. After we were done fishing, I was talking to a couple guys that said they did pretty well in the morning. They said they were using jerk baits in about 7 ft of water.
 
I noticed the surface temp was only 48 degrees yesterday. Over the years, for my first weekend on the water in May, the surface temp is 52 degrees. Someone else I was talking to mentioned that the big cold front that came through the previous 3 days cooled the water down pretty good and that's probably what affected the fishing.