4 metre soulpad here with zip-in ground sheet. Soulpads come with mozzi doors as standard.
Zip-in groundsheet means the tent is easier to dry with the sheet removed when sopping wet, can be used without the groundsheet for an event shelter and keeps the drafts and beasties out when you're camping in it.
4 metre is perfect size for two plus a dog. 5 metre is significantly bigger usually attracting additional fees on campsite pitches, more of a nightmare to dry and man-handle if you're pitching it alone.
I'm biased but would go for a 4 metre Soulpad with zip-in ground sheet.
We take rugs from home many of which we have woven ourselves on peglooms. Couple of deer skins. Two thermarests slipped in a duvet cover to keep them together in a double bed kind of way. Duvet. Proper comfort camping!
Wood burner is on our list to get when funds allow. Had the tent 4 years now and love it to bits
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