Hey there
Here is a point that you may want to think about, when people do exercises or skills in the water as part of a course the temptation is always to try to do them as fast as possible in order to try to demonstrate proficiency or maybe just to get them done and out of the way, often on the rescue course this is amplified and people often make sloppy mistakes as a result of rushing the scenarios. I am not implying you are making these mistakes or even that you are trying to do things too fast but this is just an observation from other courses.
Next time you are in the water trying this scenario, why don't you just try it a little slower, you say it is the part where you are swimming to shore/boat, just don't kick so hard, its the strain that is causing the cramp. Now then if this were a real situation and the victim was not breathing then of course you would want to get them out of the water ASAP but then if it were a real situation and you were trying to get them out of the water ASAP and you seized up with cramp then that would not help the victim at all. For that reason if it is the speed at which you are trying to swim that is causing the issue then it would be a good move to slow it down and find the actual speed that you can move at in order to get the victim and yourself out of the water cramp free, a little slower is better than not at all.
Here is a point that you may want to think about, when people do exercises or skills in the water as part of a course the temptation is always to try to do them as fast as possible in order to try to demonstrate proficiency or maybe just to get them done and out of the way, often on the rescue course this is amplified and people often make sloppy mistakes as a result of rushing the scenarios. I am not implying you are making these mistakes or even that you are trying to do things too fast but this is just an observation from other courses.
Next time you are in the water trying this scenario, why don't you just try it a little slower, you say it is the part where you are swimming to shore/boat, just don't kick so hard, its the strain that is causing the cramp. Now then if this were a real situation and the victim was not breathing then of course you would want to get them out of the water ASAP but then if it were a real situation and you were trying to get them out of the water ASAP and you seized up with cramp then that would not help the victim at all. For that reason if it is the speed at which you are trying to swim that is causing the issue then it would be a good move to slow it down and find the actual speed that you can move at in order to get the victim and yourself out of the water cramp free, a little slower is better than not at all.