lostinlondon...DS literally came home, had a shower and a bath (!), ate a pizza and sat in his PJs for two hours. He is usually very lively but today was really full on I think. He was a bit teary when he got back, sheer exhaustion I think. Also, it was my Dad that brought him home as I was at work and I think he may have grilled him for the entire hour+ journey home which frankly may have been more exhausting than the sports assessment!!
Your DS may well be raring to go however.
One other point, the letter said collect at 4pm, Dad got there at 3.30pm and the boys were all sitting there waiting. Some had already left. Maybe worth rechecking the plan for tomorrow. Glad Dad got there early otherwise DS could have been sat there forlornly until 4pm.