I have a couple of solutions for 2m work … depending on the situation
Homebrew dipole from telescopic 'TV rabbit ears", can be used horizontal for SSB (arms a bit in a V to get 50 Ohm), or vertical as a ground plane (one leg vertical, one under 45 degrees). Just feeding with 50 Ohm coax without balun, it works … the plastic tube is for mounting on a hotel window or balcony, for sota I just put this tube to my fishing pole with velcro strips.
Last year I bought a 4 elem logperiodic (2/70) from Anjo Antennen (http://www.joachims-gmbh.de/detail_blatt/LP145435E.html), I had a 250 km qso with it (SSB with 20W from FT857D). It packs small (fits in my backpack), but it is easy to lose some screws when in the woods … I do the assembly on a towel so I can find the parts when I drop them, hi
For my handheld FT1D, I have a flexible quarterwave from ebay , only 3€, works well
(search ebay for Nagoya NA-771). It looks identical to a Diamond antenna which has the same number (RH-771) … so probably from the same factory