Bob,
I sense that you may be overloading in either craft. I have an A36.
Empty wt is 2550, gross 3600, giving you 1050 to play with. Full fuel
is 80 gal (480 lb) bringing us to 570 lb with full tanks. Playing with
fuel, even with 1/2 tanks, gains you 240 lb (=810 useful load). Now
takeoff is not permited with less that 1/4 fuel because of risk of fuel
starvation (location of fuel pickup in tank).

There is a small shelf and compartment behind seats 5 & 6. You can fit
in 2 small-medium size suitcases and misc there. Behind that there is
a bulkhead. In that space is the flight director computer, AP servos,
ELT, and a maze of control cables. Do not plan on putting anything
there.

In club config there is a small space between the 1st and 2nd row. I
keep my flight bag, O2 bottle, fire ext., and a roll of paper towels
there. You could cram more in there but better leave some space to get
to the manual gear crank in the unlikely case you should need it. Also
leave a little space to recline the front seats.

Looking at newpiper.com, a Saratoga has nearly the same specs (3600
gross, ~2300 empty, but it carries more fuel, so not a major
difference.

I do not knot the Lance specs but they cannot be a whole lot different.

I have about 700 hrs in my Bonanza and have encountered a variety of
loading situations. Much to the dismay of some wannabe passengers,
sometimes the answer is no. 2 weeks ago I was asked if 6 of us could
travel to a 30th anniversery party, Only one person less that 120lb,
one 280, two 150's and two 230's. Gross would have been about 4000 lb.
The tanks were full and I had no pump available to drain off fuel. So
sorry. Ended up only 3 of us went and things were fine.

Four people and a load of luggage works well. Plenty of space for
everyone. Six will work if the kids are small, but they grow fast and
what works this year may not work next.

My 2 cents.

Bob