If youre stuck in a country where dubia roaches are illegal like me and you have to use crickets, theres no reason to use a 10 gallon for only 40 crickets. I dont know how old your beardie is but mine eats 50 a day, hes about 5 months old. If youre going to use a 10g buy 250 or 500 and get a bulk discount.
There is no way to stop it smelling without regular cleaning. You can keep them outside in the shade or the garage but i still lose a ton from overheating in the summer and i live in canada. I hate keeping crickets in my house. And id rather throw out the cricket keeper and get a new one every week.
So nowadays I just buy a new batch of 50 crickets every single day. Theres a pet store near my work I can go on lunch. And another just a few min off my commute.
On the weekends Ill drive out 10min to the pet store its a hassle but i dont care I hate keeping crickets. They suck and theres not much to do about that. Can't wait until he is big enough that i can start subbing in superworms.
If you still want to keep crickets id buy a little cricket keeper for $10 and just buy 2 or 3 days worth of crickets at a time so they have less time to die and poop and gunk up the keeper and then fill it with bleach solution and spray with a hose from a distance at the end of those 3 days. Btw, they WILL escape. Its just going to happen. Even buying 1 days worth at a time and throwing them all into the tank and closing the lid immediately i still have one somewhere in this room right now.