I've done white spruce, poplar, red cedar, and white pine with a dibbler. I have the heavy duty lenoard planting bar. Besides clay, I have a fair share of rocks to pick through. Woth larger bare roots, survival rate is lower than the smaller ones. With larger bareroots, sometimes the roots shoot our 5-6 feet, so its alot of dibblin'.
The last round of trees I did both dibbling and shovel. The state nursery says dibbling is better. But, my in-laws next door are bothered by a new home built in their backyard. So, I turn a a good 3ft circle of dirt. Mixed in some better soil, some lime, and fertilizer. Dibbled bareroots get agriform tablets as well as the pines I planted with a shovel. Despite a dry summer and bi-weekly watering. The pines did alot better. ONly lost 1 out of 10. Lost about 6 or 7 out of 25 white spruces.
Did another experiment too. mulched some spruces and left some alone. Did the same with 1/2 my antonovka's bareroot apple trees. MAde a huge difference. Did so well, I mulched the other half of the spruces.
Short story long....... It's not how many you can do, it's how many you can do well. 1800 feet..... Do what you can well a year...... Spread it over a few years if needed.