Depends... Do you mind a trailer? If not get the tandem PA. No trailer oasis/outfitter or a single.
I have a 14 outfitter and i handle it by myself 90% of the time. Some times i am solo sometimes my 3yr up front.
Fishing is easy from it i stand in it all the time but not really to cast just to get to gear, get my line out of the trees, or to pick my daughter up out of the water (she is fearless and will stand on the bow all the time).
When i go solo i put a 25# weight in the front and it rides nice. I am 6ft 200 lbs and my wife and kids together are only 150 so i can squish everyone on the yak (and we have but then i end up doing all the peddling).
Never tried the oasis as i got a deal on the outfitter but i like it. I will sell it when i find a good used TI as i like sailing better than fishing but fishing works on it just fine.