I’ve only used collapsible poles with a packraft, but I’d like to use my fixed length poles if I can figure out a good way to strap them on. With my collapsibles I’ve just shoved them in my pack’s side pocket and secured them to the pack with the compression straps – they stick out a few inches but there are no performance concerns.
The max outside width on an Alpaca is 38"/97cm, and probably about 30 inches across at the bow lash loops.
My fixed length BPL STIX are 46" long, which means if I lashed my poles across my boat I’d be at least 8" wider (4" each side), and probably more like 16" wider at the front (8" each side). This assumes the middle of the pole is in line with the middle of the boat – if I store them like I store my collapsibles they’ll be sticking out fully 8" or 16" on one side. In creeks this would seem problematic. Big rivers probably okay.
Anybody have experience with attaching similarly long items on their boat? I searched the forums for “skis” but that didn’t come up with anything – I would have to assume that skis go length-wise. Fixed length poles don’t go obviously one way or the other.