Can anyone suggest a boat/hull cleaner for my fiberglass bass boat? Specifically, an everyday type light duty cleaner that doesn't have wax in it. Homemade or commercial, so long as it works and doesn't smell like Italian salad dressing.

Simonize and elbow grease. 

I have tried a lot of products and finally settled on Bow to Stern.  It is a polymer sealer.  You put on a coat and let it dry, put on another coat and let it dry, put on a 3rd coat and let it dry.  Then you are good to go for a month or so depending on how often you use the boat and how much it is outside.  For in between cleanings wipe it with a wet cloth and dry it with a towel.  I've been using it for the last couple of years.  It is good stuff.

I have tried a lot of products and finally settled on Bow to Stern.  It is a polymer sealer.  You put on a coat and let it dry, put on another coat and let it dry, put on a 3rd coat and let it dry.  Then you are good to go for a month or so depending on how often you use the boat and how much it is outside.  For in between cleanings wipe it with a wet cloth and dry it with a towel.  I've been using it for the last couple of years.  It is good stuff.

I use BTS as well. But usually only about twice per year. What I'm looking for is something to spray on and wipe off after a day on the water just to get whatever collected on the hull, off. I can't just wash the thing off in the driveway anymore. Draught, water usage restrictions, fines and all that. So I have to clean her up in the boat port behind closed gates. I don't care for the wax/cleaners cuz I use the BTS instead of wax, but I don't want to strip that off with vinegar, lemon juice or the like. Guess I'll just continue with the wet towel as well.

Best thing for ours we found is to wipe it down with a wet rag as soon as we pull it out of the water and strap it down for travel. If its summer there is usually plenty of clean water from the cooler when we pull the plug out. even if we have to use water from the livewells its still better and easier then than if we let it dry on the boat and then try to clean it.

Most often I just wipe it down with a damp cloth when I pull it out of the water.  But I also use McGuires Quick Clean Marine.   Spray it on and wipe it off.  It protects and shines very nice.  And its o.k. if you get it on the rub rail or other black rubber/plastic unlike wax it wont mar plastics.  A bottle of it last a long time to if you are judicious with it.

Stay brite it cleaned up my scruffy looking 350 v years back even cleaned the surface rust off my trailer rinse it off quickly it has muiratic acid in it