Wood boilers, especially a crown royal stove, are very heavy units. Even though the boilers are stout units they are designed to be moved easily.
There are a few ways to lift a stove. First, and preferred, is to lift from the bottom. Either lift with a 6' forks from the front using the fork pockets built into the stove. Lifting from the side is possible using 4' forks by using a 2x4 laid between the legs going the long way to help support the stove and prevent any damage to the siding.
Second option is to lift from the top hook. The boiler is will balanced and when using this approach be careful as the boiler will sway.
No matter which option you use, make sure the machinery being used can handle the weight. if lifting with a skid steer or forklift, factor an additional 50% to the weight of the boiler to compensate for the length.
When strapping to the trailer, use the stake pockets on the legs as tie-down points. Use a strap or chain on each leg and cross if possible to keep the boiler from shifting. Bind to the trailer pulling down to the trailer tightening the boiler as much as possible. Make sure all doors are latched to prevent opening during transport.