I can only speak to my experience on beaches with some tow but not really strong tow.
On a surf beach with a tow the Drogue did not extend in a direct line from the back of the boat but went back at an angle as you might expect.
The whole idea of the Drogue is to slow the boat not to stop it so the towing force should not be insurmountable if you make your series with an appropriate number of drogues on it. As I say, mine has 9 - they were sold commercially from Oz if I remember and are about the size of a plastic cup open at both ends with tapes sewn along the entire length of the cup for strength - with this number I can easily tow the Drogue with the mirage drive but the boat gets slowed as a wave passes.
The process should be that as the wave lifts the boat to the crest, threatening to throw it forward down the face in a 'surf', the boat will initially lift and move forward with the wave, but then, as the Drogue bites, the increased resistance will hold the boat back, effectively pulling it backwards through the breaking wave, except that the boat is probably still moving forwards. You can feel this happening on every wave when you sit in the surf.
The initial forward movement is important: if the boat were stationary it would get hit with the full force of the wave from the stern just as though it were a rock or a pile stuck up in the middle of the beach - and breaking waves are very powerful; the forward movement means that as the wave breaks over the back of the boat the boat is moving at very nearly the same speed as the wave and therefore the force of the collision between the two objects, both moving in the same direction, is dramatically reduced. Again, you can feel it on the boat: a monster wave builds up behind you (and you are really aware of how low in the water you sit at this point) and you think you are gonna get absolutely pounded, the boat lifts and accelerates forwards and just as you think you are going to get smashed round the ears by the pitching crest, a firm but relatively gentle force pulls you back and the crest burbles past, sometimes with a surfer on it.
Compared with a 'normal' kayaking experience in waves like this the effect is simply amazing and remarkably benign.
HOWEVER it should be said that the boat does buck like crazy in big waves and it can be quite difficult to keep your seat.
The most tricky part of the whole enterprise was not the stowing - the Drogue is really just like a coil of rope with some knickers sewn onto it - but the deploying. I did not want mine to be attached with a Padeye that could pull out at the critical moment and hole the stern deck of the boat in the middle of a surf re-entry! Also the Hobie rudder assembly sits higher than the deck and I didn't want the Drogue to interfere with or even break the rudder. So I came up with a semi-permanently installed bridle made of strong nylon marine tape (so that it would sit flat against the underside of the hull to reduce drag and present a flat surface to spread load); this goes through the load space scuppers on my Adventure and the two 'legs' of the bridle are long enough to clear the rudder and have loops in the end to which I tie the Drogue. The tricky bit, though,is throwing the bridle out of the back of the boat over the rudder successfully - believe me, it is not as easy as it might seem!
Finally, my Drogue doesn't have a weight in the end, which, if you do your research is one of the design features. Personally I have not found it to be necessary but I really don't use the Drogue that often these days. And, by the way, if you are thinking that a weight at the end of the Drogue would make it easier to deploy you would be wrong: it is not difficult to get the end of the Drogue (where the weight would be) into the water - the tricky bit is getting the inboard end of the Drogue and its bridle over the back of the boat in the right configuration.
Personally i feel that anyone who kayaks regularly on a SOT kayak (especially one with a mirage drive) from a proper surf beach stands to benefit hugely from series Drogue technology. I was stunned by its ability to allow me to come back into beaches that are otherwise the preserve of 'proper' surfers without any real concerns about my safety and no concerns about being surfed and rolled. In these conditions I would be quite happy to take my kayak out through the break knowing that I would get back in without damage or loss and it is quite good fun to stop your boat right in the middle of the surf and watch the surfers surfing round you and generally doing their thing. I only wish I had photos/videos to show (now there's a thought for later in the season when the weather is warmer...)
Hope this helps.
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