The blade mast is not very heavy and quite easy to step. I step mine solo all the time.

Here is my process:
1. Leave boat strapped to the trailer
2. Lay out all wires, make sure none of them are a tangle issue.
3. Run the spinaker halyard through the mast support on the trailer.
4. Then run the spinaker halyard through the jib cleats on the front crossbar.
5. Put mast into stepping pin connection.
6. Get on tramp and raise the mast.
7. Pull slack off the spin halyard and tighten.

This will have the mast leaning enough distance foward, so you can get off the tramp and instal the forestay.

8. Install forestay
9. uncleat spin halyard and remove it from the cleat, and trailer mast support.
10. Tighten down the sidestays
11. Rig the boat in its entirely
12. Go sailing and have fun.

To take down
Same as above but in reverse order.