FWIW we did rolling take offs in our CH113A Labradors (H46 Sea Knight or BV107 variant). In the summer heat with 6000lbs fuel on board we were over gross and had to run off.
Back door wasn't great, dump fuel and return to the runway but we did this when we knew we had a long SAR trip ahead of us.
I've also done them in Sea Kings, it was more of technique thing to practice getting off the water on one engine. We'd start learning the finesse required by doing running take offs from the runway then we'd do them off the water (simulated by limiting the amount of power used)
If you handle the machine properly and observe the limits you will not harm anything. Brief it first and don't be afraid to knock it off if things don't look right.