Only from memory the RPRA rule is 1 night in the basket 44sq in. per bird, 2 nights 52 sq in. and 3 nights 60sq in. this could have changed. We put 30 max. in for land racing but would prefer a lot less.
Not started yet but know a few have I usually start 2/3 weeks before the 1st race which is Shrewsbury 45mls to me and I start at 15mls (by road) and keep them there, if I've still got them.atb.