Hi Chris,
For small + portable, I would also recommend an O’Connor DV head (if you can find a used one). It’s a compact, true fluid head that will last a lifetime with proper maintenance. Pair that with a Trost slider, flat base version (sadly discontinued in all forms) along w/ Gitzo sticks and you can get smooth, portable, rock-solid results on 50mm++. The setup is limited to about 20” travel …enough for a 3 sec dolly shot, but that’s the sacrifice for portability.