Hi Caz and welcome on board!
A couple of observations/questions:
1) there's no "should". Only you and your husband can decide what's an appropriate allocation of your money. Hopefully what this site can do (along with your other reading and research) is point out some different options for creating wealth that perhaps you hadn't thought of before.
2) What do you need at the moment to achieve your goals safely? By which I mean, for example, are your IPs heavily negatively geared so that you want some additional income to meet the holding costs? Or do you just want some extra cash to accelerate your wealth building/personal spending? Your immediate needs and long term goals should drive your investment decisions. By seeking to emulate the Somers model I don't think you can go far wrong!
3) Asset protection is just one benefit of trusts. The tax advantages of being able to stream income and in some cases defer tax are tremendous...particularly in your scenario with one working spouse and one spouse at home (but still working hard!

).
4) Do you have valid and up to date wills, powers of attorney and enduring guardian directives in place? In your situation with young kids a testamentary trust will is critical in my view.
5) Personal risk insurance - with hubby the sole breadwinner you should be insuring his ability to work and earn income to pay for the IPs!
6) All investing involves some degree of risk. You say you want safety...but really: a diversified mix of solid, blue chip companies with solid earnings, low gearing, geographically diverse and sound businesses are much safer than your IPs...particularly if you don't gear too heavily to buy those shares... It's a mindset shift I know...but think about it. Ignoring the gearing for a moment, would you rather have your IP or an equivalent value of shares in say woolworths or commonwealth bank?
Given you're inexperience with shares, investing through a managed fund, LIC or even buying exchange traded funds (ETFs) eg streettracks would be a sensible way to go. Also, bear in mind that with the market cracking new highs on a regular basis, it is perhaps not the right time to just dump a huge chunk of cash into the market!
One option may be to set up a regular drip feed into a fund or just regularly buy into an LIC or ETF over a few months to get a better feel for this type of investing. You could even combine that with regular gearing via a margin loan i.e. you put in $500 a month and the margin lender lends you $500 so there's twice the amount dribbling into the market...
In any event...just some food for thought.
ps. If you're not happy with your planner then see them, tell them, demand an explanation and decide whether or not to move.
Cheers
N.