If you use the jib halyard to pull the boat over, the load is placed at the point of the mast stabilized by the stays. The force that you are applying is less, considerably less than that the sails apply to heel a fully rigged and crewed boat (especially with the crew on the rail, hiking out). If mast or stays sustain damage from careening, be happy you didn't sail the boat
You would tension the shrouds and forestay the same amount you'd use for sailing. Once the boat is laid over, a very small force (comparatively) will hold it in position. Something corresponding to the weight of a typical concrete block...
The hull is a different matter. I do advise the use of carpeting, because the hull will be supported on a small area, taking much higher loads locally than if you have the boat in the water. However, experience has shown that the DS does not normally sustain damage from that - the hull is beefy enough. So the main point of using a bit of carpet is to prevent damage due to something small and hard scratching the hull or cracking the gelcoat.
Good luck - don't overthink this, get your paint on and go sailing!