Hey There! We're going to be at DLR at the same time

I already have a PTR going too, so don't feel bad about starting one so early

As far as hotels, the ones on harbor right across the street from the entrance are pretty cheap and clean, if a bit worn around the edges from all the traffic through them.
We were originally going to stay at the Carousel Inn and Suites (still need to cancel our rese there) before we made things work to finally stay at the Disneyland Resort. Last trip we stayed at the Best Western Park Place and it was clean and reasonably comfy.
I'm jealous that you already have a basic itinerary together - lol Overplanners unite! Cute pups btw, we're leaving behind two little furry ones ourselves. But much better to leave them with someone than to take them down and then lock them away in a strange place all day.
I look forward to reading more - have a great evening!