try to get the tatoo on a friday/saturday/sunday, take 7 days off from lifting while it heals. it will warp if the area is getting pumped up while it is initially healing. use Aquaphor by Ceptaphil to help it heal, its the best stuff you can use, period. good luck sleeping on your stomach for the first couple days haha.
in terms of squats i have a bruise/dark spot on my upper neck all the time, i think its permanent, from doing squats, but i have sensitive skin and you might have bad ass skin and it wont affect it. atleast chicks know youre not some douche that doesnt do legs haha.