On the Sea or "Sea conditions" we have been using only seats in front of console and rear seats. So both boats are comfortable for 5 people.
On the lake/river you can use seats in front of console but it really depends of persons "size". I do not have Zodica, but I do have 5,4 RIB having 2 jockeys, rear 3 seats, seat in front of console and some place on bow locker - very similar on Zodiac. 2,4m width 1,3-1,4 internal width.
I could make trip (3 hrs in total) having 9 people on board but 3 of them were kids.
So in total we had: me and my friend on jockeys (2 big mans), on rear seats my boys - twins (170 cm but only 60 kg). Between them 9y old kid, in front of console 2 women, and on the bow 2 kids.
Lakes not very big (I think 20 km x 20 km and some channels between them)
In the Greece (Med Sea) we use ONLY jockeys and rear seats.
Any other seats I will propose my enemy maybe.
I have chosen 5,4m RIB because:
- my Family is slim (except me 190 cm x 90 kg)
- I tow my boat to Greece (2500 km) or Croatia (1400 km) or Baltic Sea/Lakes 400-700 km
- So I do prefer lighter, smaller boat not to be at my car tow limit
In other case I would prefer 6,5m boat and 150 HP engine
Please check internal width for both boat and deck space.
Check if 3 person will fit in such area on rear bench
Many Suzuki modern 4T outboard users report reasonable fuel consumption. So if you have more than 2 km per 1 liter maybe standard tank be enough for you or maybe there is an option to buy Zodiac with bigger tank.
We always carry 20 l spare fuel in 2 cans keeping in console locker. Just in case if conditions be much worse than we expected and fuel consumption be much higher than we expected (It happens ones in Greece when we have to use them, we returned against wind and waves back)