Hi Maureen, and welcome to the HOD Board!

You've gotten such good ideas here already. I know it is busy with a toddler in the mix - I have one myself, and he's a ball of fire.

I agree it's important to fill up the toddler's love tank first. I started LHTH half-speed for this purpose, but for now you could just plan 15 minutes with him first thing in the day, maybe doing something active if he's a mover and a shaker.
As far as doing 2 guides, I like blocks of time. We are doing RTR, Bigger half-speed, and LHTH now. I schedule blocks of time with each child, and that has been a real help for me. Your dc are old enough to each have a 30 minute (or more) playtime with your toddler. I do this, and while one is playing with our toddler, I am working with the other son. This not only gives us quiet work time 1:1, it also continues to fill the toddler's emotional tank.

Here is a copy of our schedule this year, so you can see what I mean about blocks of teaching time:
While I am not always right on for times in our schedule, we keep the routine of it the same. This is so important for me, as it stops all of the constant onslaught of questions..."Mom, what's next?", "Do I play with toddler today?", "Can I do reading now?", etc.
Another thing that helps is to teach the older dc as much independence as possible. My oldest ds uses the HOD guide as his own. He is responsible for reading the boxes of plans, getting out the materials he needs, doing the "I" boxes on his own, checking off the boxes as he finishes them, putting away his own materials, handing in his things on the counter to be checked, etc. I realized he was interrupting me with questions like, "What do I do now?", "Where should I put this?", "Can you get my math book, Mom?", etc. Once we had a routine way of doing things, a routine place for materials, a routine place to hand things in, etc. life became so much e-a-s-i-e-r!

We start working on this independence already in Bigger Hearts. Your child doing PHFHG should be ready for this level of independence too.
A few things that helped us with teaching independence...
*a copy of the schedule for everyone
*a rule of not interrupting mom when it's not your time with her (your time will be coming)
*2 sets of art supplies in a mobile container (so each child can have his own)
*2 places to work (so each child can spread out and have his own work space)
*2 plastic tubs for each child, one with books we are using right now, and one with the books we will use later in the year (i.e. one DITHOR book, 1 storytime book, etc. in the "now" tub; the other books in the "later" tub)
*hand things in to be corrected on the counter
If you get a chance to post your schedule, we can all help with ideas for that too! I hope something here helps, but here are some great links for things to do with the toddler too:
What to do with toddlers while schooling:
viewtopic.php?f=5&t=198&p=33557
viewtopic.php?f=6&t=4987&p=36744#p36744
Here is a current thread about a similar topic too:
viewtopic.php?f=6&t=7649
In Christ,
Julie