I HAD A CRAZY IDEA

thank you all. yes, i like thinking outside the box. im certain that there are turbines that i can get/make that can take the wind pressure and revolutions. As for the shaft and other parts, well i can always gear it down so that the system doesn't have to deal with the high revolutions/heat/wear. the next thought was that i would set up an alarm so that it will notify me when the batteries are 100%. at that point i can either put an electrical "shut off" between the alternator and the batteries or just program the charging control unit. more likely i will (possibly in addition to), go the physical route. meaning ill take the turbine offline and possibly even cover it to prevent rotation. im not worried about the gas mileage, towing a 3500lb trailer is going to make enough of a dent, i dont think a 6 inch across turbine is going to reduce my mpg much more. To answer some of you, i am already planning on using the roof of the trailer for panels, making a clear plastic case and a separate battery bank inside the tailer for that. this one was to be a small model, one or two batteries with a small turbine and a micro alternator. very small system. then ill put the usb's etc in a panel in the back on the side. i also have military grade flexible panels - 200w that are sewn into a roll up fabric that i can just throw over the hood of the truck or whatever. (1999 mits montero sport). ive created a "tankless water heater" for the truck as well, water storage tanks under the running boards, run hoses to the engine where they combine to one. that hose serpentines around under the hood, covering as much out of the way space as possible, then exits the engine bay to an actual hose bib, i hook a hose to this, i have a small usb pump, a ten foot retractable pole that goes into my hitch, (usually has a 40led light on it) i hook up the hose and put a shower head on the end. viola! instant hot water shower anywhere i go camping. i need the juice to run things like that. lots of other ideas too.

thank you @mcgivor , you can tell i try to live up to your names sake lol, i plan on talking to a few mechanics on the car part. from what i understand of what you replied, the voltage regulator is the gatekeeper lol. the alternator is already running so its no additional "cost" and the vr effective cuts off the flow when the battery is full, following the logic, a controller could manage where the energy is to go once the starting battery is full. i think thats manageable . the other side, if the alt doesnt have enough excess generation capacity, can the cars system tolerate a larger alternator? or fry stuff. an example fo the questions, i try to think logically and lowest cost easiest to build, there are micro alternators out there designed to run at hi revs, theres lots of solutions. im leaning towards a second alternator i think. then decide on how to drive it, prob the car, its already set up for it already, just another bracket or to ta mcgyver lol. wire it autonomous to the car. i also want to repeat that same system for when i get to where im going.ill set up a wind mill at location in addition to panels but i wanna do the stationary bike deal to drive the alt. get my exercise at the same time i generat, then just switch the belt back over to windmill. just trying to find a way to always have ample juice