pumpkin/squash beginner

Hi, I am interested in landraces, watching Joseph Lofthouse's videos. I finally want to start doing it.
We have two gardens, one small with plenty of water and a bigger one with very limited water and a lot of wildlife pressure.
I want two pumpkin/squash landraces. Both should be prolific yielders, flesh more on the dry side, good taste and not uniform all sorts of outer shapes and colours, but no huge seed cavity and thin flesh.
The one for the small garden should grow on a trellis without additional support.
The one in the big garden should cope with water stress. Preferably also with wildlife, but I guess that would be too much to ask. We have kangaroos, rats and deer. The deer are the worst, and they are super difficult to keep out.

I guess I would have to start with two species (I already saved some seeds, but I don't know what they are), which ones would be the most suitable? As far as I know, there are moschata, maxima and pepo. I would say for the small garden moschata and for the big garden maxima? We are in Coastal NSW 2 hours north of Sydney, USDA zone 10 frost-free. It can be moist, but it can also be very dry. What do you think?

Cheers!  Great goals there!
I know next to nothing about growing conditions in any part of Australia.
The climate here is a mix of Cool Wet Winters and Dry Summers - with plenty of Deer pressure and also with increasing risk of wildfires.  No Kangaroos to speak of though we once kept Emus, briefly.

I have attempted a few years growing my own landrace of C. Maxima varieties, but I find Squash Bugs to prefer them dramatically... making things more difficult there - not sure if that is an issue where you live, but something to consider.
They do however often have harder shells that make them more resistant to larger pests, in my experience.

Per your desired qualities of thin skin with dry flesh, I would say many of the C. Moschata varieties fit that bill -such as Butternut.
That sort is my next project for making a landrace, as they seem most resistant to Squash Bugs.

Many kinds of C. Pepo I have grown are often on the waterier side, though not all of them are.
Also, C. Pepo is probably the most-planted sort as it includes most of the Summer squash types, Spaghetti squash, and Jack-o-lanterns - hence any near neighbors' gardens will likely cross-pollinate with them unless you bag them and hand-pollinate.

What sorts of Winter Squash/Pumpkins are most grown in your area?  A mix of those varieties might be a good start.

I am just a beginner at trying to make a landrace, but I have grown various Squash varieties for decades.
A fine goal you have, and good luck to you!