The QRPer Board

suitable for portable operations

https://www.m0pzt.com/cobweb-aerial/

and being omnidirectional may be useful for POTA
the antenna offers a gain around 6dBi with low takeoff angle and an almost omnidirectional pattern

it can be built using stuff found in most "home improvement" stores, so... why not ?

as for gain and pattern let's start with this image



as a reference, the main axis of the radiation solid runs from top to bottom of image and, with the antenna placed at 10m height it offers more than 6dBi of gain, the other axis (left-right) offers more than 3dBi (half S point) so one can easiily forget about rotating the antenna since a 3dBi difference is negligible and it will be almost unnoticeable in most cases