You could always try something like this:
Link – Ebay Auction
It’s remotely controlled, waterproof, etc.
No matter which way you decide to go, for removability, I would mount it to one of those minn-kota quick-release brackets that most folks use for trolling motors. That’s what I do on my fish-n-ski boat anyway. Or, some folks get theirs rigged to one of the flush-mount scotty rod holders or something like that. Both good options for taking them off when you’re fishing during daylight-only hours.