You did a great job with the tailoring - fitted but not tight. Haha I am an XL-XXL here in Hong Kong, so I understand the sizing issue - you can just cut the tag out completely, if it bothers you
I think part of why you may be hesitating is that, whilst it's a nice dress, I'm not sure if it's a 'wow' dress for you. Please don't take that as an insult - your alterations have certainly made the dress nicer, but the print seems a little plain to my eye. It's difficult to explain but the mass expanse of white with a non-overlapping floral pattern reads as 'safe' to me - a dress like this would do well in a conservative environment like a day wedding, baby shower or church but, since you're talking about wearing it casually or camping, you may want to consider whether this would be appropriate for you.
Of course I may be completely wrong once you style it up & feel like it fits well into your existing wardrobe & lifestyle (in which case feel free to ignore all of this ) but I'm wondering whether that level of dressing up would be feasible or realistic in the long run (since you mentioned wanting to keep it simple for summer, you'll need to see if a bag & shoes alone are enough for you). If you start to feel that you need jewellery & a belt or scarf etc to make it work, you may need to reassess how natural of a fit the dress is into your preexisting life.
(Again, I hope I didn't offend! I was just getting the vibe that you're still a little on the fence about the dress, & so was just thinking aloud as to why that might be).