And early H production started in June...so some of those phots may be from Sicily, but the III-N is most definitely from Tunisia. The 501st surrendered in Tunisia and was not reconstituted, so the marking on the III-N is definitive IMHO.
The Life color photos span a great length of time and are indeed an excellent resource. The pic of the Pz IV from the rear up above for example clearly shows two-tone "Tropen" scheme on the turret bin and rear hull.
These two appear to be from a different location altogether (note the presence of flowers, different landscape background, taller grass, etc.) vs. the one above although it's tough to say for sure. The two below would be good indications of DY with the color filtering/shift taken into consideration. The first one also gives a good hint of what Olivegrun looked like too.
IIRC the two photos above were taken in either Sicily or Italy and are not related to Tunisia.