Pumpkin Brew Day Turns into a Nightmare

This has been by far the longest, most frustrating brew day to date.

But I guess it is apropos for a Halloween beer to turn into a horror story.
I'll post the recipe and then explain what happened:

Hellish Halloween Harvest Beer
4.53 ^KG 10 ^LB Domestic 2 row pale
.43^KG1^LB Biscuit (Melanoiden) Malt
.22^KG1/2^LB Crystal Malt
2 small sugar pumpkins baked in the oven at 350 for one hour
2 orange sweet potatoes baked in the oven at 350 for one hour

I chose to mash the veggies instead of including them in the boil.
18 Grams / 1/2 Ounce Nugget Hops 60 mins
29 Grams / 1 Ounce Hersbrucker 5 mins
Wyeast 1275
(I bottled my British Mild tonight, and will rack on top of the yeast slurry)
I picked up my grains this morning and had my boys gut the sugar pumpkins and they had a great time doing it.

Everything went according to plan until it was time to chill the beer and that's where it all fell apart. The immersion chiller sprung a leak and gave the beer about 3 extra gallons of cold water. There was a lot of swearing. The only choice I thought I had was to boil to reduce back down to 5 gallons. Well, 4 hours later, I was finally able to put it in the bathtub full of cold water. I didn't dare try fixing or using the immersion chiller ( that would be just asking for more trouble).

I didn't know what to do regarding the hops or what the best method would be so I threw in 18 grams of nugget at 60 mins left in the boil and 29 grams of Hersbrucker at flameout. I wonder what the double dosing of the wort with the additional hops will lend to the beer? I tried the sweet wort and it tasted like a baby bitter but unfortunately, I didn't get any pumpkin notes. Of course, you shouldn't judge a beer on the first day so I will wait and find out.
Well, it is 4 AM and I think it's finally reached its pitchable temperature. Then, I'm off to bed. This was my first 14 hour brew day. I hope that never happens again.