• prabhāse — at Prabhāsa
  Prabhā (radiance) + āsa (seat). One of the foremost tīrthas in Gujarat, near Dvārakā. Site of the future Yadu-mauṣala-līlā. Balarāma's bath here echoes forward in the canon.
• santarpya — having satisfied (with offerings)
  Gerund of sam-√tṛp. Causative — 'caused to be fully satisfied.' The act of tarpaṇa, ritual offering of water, especially to pitṛs. Even the Lord performs śrāddha — pedagogy for the lokas.
• deva-ṛṣi-pitṛ-mānavān — devas, sages, ancestors, humans
  Dvandva listing the four categories of honored beings. Pitṛ-yajña, deva-yajña, ṛṣi-yajña, and nara-yajña — the four of the pañca-mahā-yajña system, minus bhūta. Balarāma teaches the householder template.
• sarasvatīm prati-srotam — the westward-flowing Sarasvatī
  Prati-srota = against the current, here meaning the unusual western course. The Sarasvatī is the river of speech and learning; its westward stretch is rare and sacred.
• brāhmaṇa-saṁvṛtaḥ — surrounded by brāhmaṇas
  Brāhmaṇa + sam-vṛta (surrounded). Balarāma's entourage is not warriors but brāhmaṇas. The Lord stages exactly the company that will later be necessary at Naimiṣa, where He kills a sūta among brāhmaṇas.

• What structure could my own retreats or pilgrimages benefit from?
• Whose company would deepen my own pilgrim path?

Prabhāsa is the very tīrtha where the Yadu line will one day conclude (SB 11.30). Balarāma bathes there now, honors devas, ṛṣis, pitṛs, mānavas — every category of being — and walks along the Sarasvatī flowing west. The pilgrimage is also a quiet rehearsal of farewell.