Are these in the ground or in containers? What trees are they? And how long established?

No in-ground tree here needs watering unless recently planted, or very young during a drought, and it certainly won’t make them come out of dormancy quicker. At the moment the soil at capacity. Watering would be pointless and wasteful. Even if your idea worked, which it won’t, a frost could kill soft forced growth.

Just leave them alone and they’ll look after themselves. Enjoy our long spring at its natural rate and let your plants develop at their natural pace for their species. Enjoy watching the progression. Why would you want everything budding at once?

They are container grown, indoors(greenhouse) and various fruiting tree.

More yeild, more pleasant to look at than winter twigs and to stagger harvests to reduce waste.

Right. That's different, since they’re in an artificial environment. You didn’t make that clear in your original post. I don’t know why you’d expect higher yields from inducing premature spring growth , nor why that would stagger harvests.

Indicate which specific kinds of trees you are asking about for others here to be best able to discuss their particular needs.

Otherwise except maybe for kinds native to desert areas where the start of the rainy season is the most important annual event in regard to tree growth other seasonal phenomena like daily hours of light (or darkness) for instance are what determine when deciduous trees bud out.

And soaking in tubs of water or "sweating" inside a small enclosure do not improve on the immediate planting of bare rooted stock directly into the ground.