I'm sure there will be other opinions, but we tell the Rocket guys to set the alignment with the tail on the ground and with the plane loaded to average flying weight. So, put in 200# of ballast in the pilot seat, and fill the gas tanks before you start.
Doing it with the tail up only makes sense if you plan to taxi with the tail up.
Greased plates are the gold standard, but cleverly used Harbor Freight furniture dollies could be used too, even if they are a bit harder to hoist the plane onto.
F1 Rocket and F4 Raider components
RV and Rocket Accessories, Tailwheels, Tools, & More
F4 Raider - under construction
F1-H Rocket "Crazy Horse" - sold
RV-4 "Chief Pontiac" - sold