first, don't use a bungee for a deck line - why have something that will stretch to 2x its whole length(that's what bungee does), just when you don't want it to when you're (or whoever yr rescuing) under extreme pressure. like if its down one side, it's conceivable that in desparation you can pull about 5 feet out sideways, if down 2 sides it's conceivable that you could pull out more than double that!!
you want something positive to hang onto. just use bungee for cross deck in front of cockpit, paddlepark beside maybe and other xdeck locations where you put gear/paddle under. everything else - decklines, paddle outriggerlock - has got to be fixed and firm.
those criss crossed bungees you see behind the cockpit of 1000's of yaks are a total useless joke.
so pls dont use a bungee crisscross there or i'll get my little swiss army knife scissors out at the portland wcp trip, heh heh.
2nd - i agree w/ dan. make separate pces so that there is redundancy. one failure dont fail all.
there are lots of options, but what if you drilled a hole 6in or whatever in front of the front bungee and the same near the cockpit. knot line, thread from under the front location. when pulled thru, seal w/ polyurethane at the front hole . then thread thru half the webloops to another hole near cockpit, which is easy to thread into and finish any way you want, slackish or tightish. then repeat for stern and the other 2 on the other side.
or also could start from the endgrab or endgrab locations
making it continuous down one side is unusual - and may not work too well with webloops as the centre ones may go backwards into the ctr of the yak under tension. like its best if they're in a straightish line for webloops - so therefore 2 pces ea side.
and if use real line, the knots are legion.
if have hard points like recessed, etc, then doesnt matter so much and conceivably could run continuous.
anyway some ideas.
ps:
if use bungee, then for xdeck situations, as under less duress, can use the cover foldback and foldover technique where bungee hardly changes in diameter. like the nylon cover is folded back, rubber clipped, ends place together, nylon cover unfolded over other side (just like a tiny condom, ha ha) and zap or epoxy glue in place. if fussy, scarf the rubber.