Are there specific things one should not wear or bring to the Asthi Visarjan ritual?

Simplicity and purity are key:

• Clothing: Avoid black clothing, as it’s often considered inauspicious for such rites. Also avoid overly bright, flashy, or revealing attire. Stick to simple, clean clothes, preferably white, off-white, or light, sober colors. Leather items (belts, wallets, shoes) are often discouraged during the core ritual; remove them if possible.
• Items: Avoid bringing unnecessary distractions like excessive electronics, food items (unless for offering/Daan), or valuables that might cause anxiety. Focus should be on the ritual. Maintain physical and mental purity – avoid alcohol or non-vegetarian food before the ritual.