John:
I am not in favor of bow thrusters, as they cost big $$$$'s, will reduce your speed a bit (flow related) 1 to 3% speed = .05 to 0.2Kt at 6kt speed. Second there is an extra option for a leak ( the big issue for me).
One thought Which I have not done (yet) is to rig a removable thruster.
The Idea: a removable bracket allowing an electrical trolling motor to be lowered through the bowsprit and bolted (clamped to the bowsprit) and with a catch to the bobstay for added strength, so as to be mounted to face 90 to the boat and have the prop under water.
elec. part (temp. move a battery up front, or wire in some big cables?) for power. Install a set of relays allowing momentary push buttons for fwd or rev on the trolling motor from the cockpit. ie, motor is fwd when the port button is pushed and rev when the starboard is pushed and not running when no button is held down.
This requires a place and time to put it on, and to take it off (sea room). So far I have not done this, as $$$'s time and need have not all met for me.
if your issue is only getting out of the slip, a line from fwd to the midship pilling then back to the cockpit could help, allowing you to hold (over a cleat) the line as you back and then release once pasted, you just have to pull the line in before motoring forward over it (that is what kids are for). For entry you could leave a line from the midship piling to the outermost piling that you can pickup when entering and have one of the kids pick it up with the boat hook and then while on the boat they can pull on the line to keep the bow to windward as needed. There are many other line options to deal with this, but really strong cross currents can be an issue.
In any case be safe, and think about what needs to be done before it has to be done and have fun.
Norm