One Dolly I used to land a BO-105 upon had a fiberglass rod whip sticking up in front of the Pilot's side Windscreen for use in line up and fore/aft placement.
We moved the aircraft forward until the Whip touched the Windscreen frame and checked for proper lateral alignment before setting down.
It took a few times to sort it all out but upon doing do landing back after dark with only the aircraft lights and the odd Flood Light near the Hangar was easy enough.
Throw in gusty winds, rain, and snow at 0300 after a long day......and it was a bit sporty but worked.
That Dolly also ran on rails and had a remote controlled winch with auto stops at each end.....with the remote being stowed in the cockpit till needed.
It was nice not having to go out into the weather to a cold soaked aircraft or clean snow/ice off it before flight.
The key to the Dolly thing is to make them plenty big.....as big as you can and still maneuver it in and around as need be.