I sent you a pm with Jude Grass's email so you can contact her and get the access code to the inner ponds.
Good places to look at iona is to walk the south jetty it is about 8 km round trip but you can see such things as were sighted recently : Jaegers out there and common and caspian terns, redheads and other seabirds. Plus a horned lark was relocated at the base of the jetty yesterday and a bullock's oriole near the washrooms.
If walking the jetty is not in the cards you can sit by the boardwalk where the large outer pond is and you can see red-winged blackbirds, ospreys catching fish and yellow-headed and red-winged blackbirds. Soras and Virginia rails are also in the reeds.
There is also a northern outer pond that you can walk around as well that borders the fraser river look for the wire near the rivver where the swallows sit. Last time I was there every type of swallow except Bank were on the wire and there were 26 rough-winged on one wire!
There is also a nice peaceful walk out on the north jetty where you can see warblers in the broom moving through.
Have a great time!