The new boat has a cleat and an aluminum over-the-tube anchor roller, so no help there.
The old boat (SIB, 14' Achilles) I used to drop the hook, pay out enough rode for the depth, tie a butterfly knot at that point, and clip it off to the inside bow D-ring (same place the bitter end of the rode was attached; same carabiner, actually.) There shouldn't be all that much chafing on the line going over the tubes; there isn't enough stretch in the line to affect it. The line does put pressure on them when the swells come up, but I never had any problem with it.
Hope this helps;