You walk both stages yourself: GetYourGuide sells no guided TMB stage or TMB trek, and the guided TMB stage days sold this summer were taken off GetYourGuide (checked 30 Sep 2026).
Both stages are straightforward to walk on your own in the hut season. Stage 4 comes 18 km down from Rifugio Elisabetta through Val Veny, about 5 h with 1,560 m of descent. Stage 5 climbs 12 km out of town to Rifugio Bonatti on the balcony above Val Ferret, about 4 h 30 min with 860 m up. Hut half board on the Italian side is €60–85 a night.
For a guided hike next summer, the Chamonix side has dates on sale. The Sunset Hike & Fondue is €250 per person for 3.5 h, ★5.0 from 6 reviews; the Personalized Guided Hike, from €320, picks a route to your level over 3.5–8 h. Both have dates on sale from October 2026 through next summer.